Update mock configurations

extra/rpm/mock/tarantool-el-5-i386.cfg

 config_opts['root'] = 'tarantool-el-5-i386'
 config_opts['target_arch'] = 'i386'
 config_opts['legal_host_arches'] = ('i386', 'i586', 'i686', 'x86_64')
-config_opts['chroot_setup_cmd'] = 'install buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install buildsys-build scl-utils-build'
 config_opts['dist'] = 'el5'  # only useful for --resultdir variable subst
 config_opts['plugin_conf']['ccache_enable'] = False
 # beware RHEL use 5Server or 5Client

extra/rpm/mock/tarantool-el-5-x86_64.cfg

 config_opts['root'] = 'tarantool-el-5-x86_64'
 config_opts['target_arch'] = 'x86_64'
 config_opts['legal_host_arches'] = ('x86_64',)
-config_opts['chroot_setup_cmd'] = 'install buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install buildsys-build scl-utils-build'
 config_opts['dist'] = 'el5'  # only useful for --resultdir variable subst
 config_opts['plugin_conf']['ccache_enable'] = False
 # beware RHEL use 5Server or 5Client

extra/rpm/mock/tarantool-el-6-i386.cfg

 config_opts['root'] = 'tarantool-el-6-i386'
 config_opts['target_arch'] = 'i386'
 config_opts['legal_host_arches'] = ('i386', 'i586', 'i686', 'x86_64')
-config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build scl-utils-build'
 config_opts['dist'] = 'el6'  # only useful for --resultdir variable subst
 config_opts['plugin_conf']['ccache_enable'] = False
 # beware RHEL use 6Server or 6Client

extra/rpm/mock/tarantool-el-6-x86_64.cfg

 config_opts['root'] = 'tarantool-el-6-x86_64'
 config_opts['target_arch'] = 'x86_64'
 config_opts['legal_host_arches'] = ('x86_64',)
-config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build scl-utils-build'
 config_opts['dist'] = 'el6'  # only useful for --resultdir variable subst
 config_opts['plugin_conf']['ccache_enable'] = False
 # beware RHEL use 6Server or 6Client

extra/rpm/mock/tarantool-el-7-x86_64.cfg

 config_opts['root'] = 'tarantool-el-7-x86_64'
 config_opts['target_arch'] = 'x86_64'
 config_opts['legal_host_arches'] = ('x86_64',)
-config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build scl-utils-build'
 config_opts['dist'] = 'el7'  # only useful for --resultdir variable subst
 
 config_opts['yum.conf'] = """
@@ -20,7 +20,7 @@ syslog_device=
 # repos
 [el]
 name=el
-baseurl=http://kojipkgs.fedoraproject.org/rhel/beta/7/x86_64/os/
+baseurl=http://mirror.centos.org/centos-7/7/os/x86_64/
 failovermethod=priority
 
 [epel]

extra/rpm/mock/tarantool-fedora-19-i386.cfg

 config_opts['root'] = 'tarantool-fedora-19-i386'
 config_opts['target_arch'] = 'i386'
 config_opts['legal_host_arches'] = ('i386', 'i586', 'i686', 'x86_64')
-config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build scl-utils-build'
 config_opts['dist'] = 'fc19'  # only useful for --resultdir variable subst
 config_opts['extra_chroot_dirs'] = [ '/run/lock', ]
 config_opts['releasever'] = '19'

extra/rpm/mock/tarantool-fedora-19-x86_64.cfg

 config_opts['root'] = 'tarantool-fedora-19-x86_64'
 config_opts['target_arch'] = 'x86_64'
 config_opts['legal_host_arches'] = ('x86_64',)
-config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build scl-utils-build'
 config_opts['dist'] = 'fc19'  # only useful for --resultdir variable subst
 config_opts['extra_chroot_dirs'] = [ '/run/lock', ]
 config_opts['releasever'] = '19'

extra/rpm/mock/tarantool-fedora-20-i386.cfg

 config_opts['root'] = 'tarantool-fedora-20-i386'
 config_opts['target_arch'] = 'i386'
 config_opts['legal_host_arches'] = ('i386', 'i586', 'i686', 'x86_64')
-config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build scl-utils-build'
 config_opts['dist'] = 'fc20'  # only useful for --resultdir variable subst
 config_opts['extra_chroot_dirs'] = [ '/run/lock', ]
 config_opts['releasever'] = '20'

extra/rpm/mock/tarantool-fedora-20-x86_64.cfg

 config_opts['root'] = 'tarantool-fedora-20-x86_64'
 config_opts['target_arch'] = 'x86_64'
 config_opts['legal_host_arches'] = ('x86_64',)
-config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build scl-utils-build'
 config_opts['dist'] = 'fc20'  # only useful for --resultdir variable subst
 config_opts['extra_chroot_dirs'] = [ '/run/lock', ]
 config_opts['releasever'] = '20'

extra/rpm/mock/tarantool-fedora-rawhide-i386.cfg

 config_opts['root'] = 'tarantool-fedora-rawhide-i386'
 config_opts['target_arch'] = 'i386'
 config_opts['legal_host_arches'] = ('i386', 'i586', 'i686', 'x86_64')
-config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build scl-utils-build'
 config_opts['dist'] = 'rawhide'  # only useful for --resultdir variable subst
 config_opts['extra_chroot_dirs'] = [ '/run/lock', ]
 config_opts['releasever'] = '21'

extra/rpm/mock/tarantool-fedora-rawhide-x86_64.cfg

 config_opts['root'] = 'tarantool-fedora-rawhide-x86_64'
 config_opts['target_arch'] = 'x86_64'
 config_opts['legal_host_arches'] = ('x86_64',)
-config_opts['chroot_setup_cmd'] = 'install @buildsys-build'
+config_opts['chroot_setup_cmd'] = 'install @buildsys-build scl-utils-build'
 config_opts['dist'] = 'rawhide'  # only useful for --resultdir variable subst
 config_opts['extra_chroot_dirs'] = [ '/run/lock', ]
 config_opts['releasever'] = '21'