Fix #722: box/bootstrap.test.py is broken in out-of-source builds

test/box/bootstrap.result

-dofile("<builddir>/extra/schema_erase.lua")
+dofile("<sourcedir>/extra/schema_erase.lua")
 ---
 ...
 box.space._schema:select{}
@@ -29,7 +29,7 @@ box.space._priv:select{}
 ---
 - []
 ...
-dofile("<builddir>/extra/schema_fill.lua")
+dofile("<sourcedir>/extra/schema_fill.lua")
 ---
 ...
 box.snapshot()

test/box/bootstrap.test.py

@@ -7,9 +7,9 @@ sys.stdout.push_filter(server_uuid, '<server uuid>')
 cluster_uuid = yaml.load(server.admin('box.space._schema:get("cluster")',
     silent = True))[0][1]
 sys.stdout.push_filter(cluster_uuid, '<cluster uuid>')
-sys.stdout.push_filter(server.builddir, '<builddir>')
+sys.stdout.push_filter(server.sourcedir, '<sourcedir>')
 
-server.admin('dofile("%s/extra/schema_erase.lua")' % server.builddir)
+server.admin('dofile("%s/extra/schema_erase.lua")' % server.sourcedir)
 server.admin('box.space._schema:select{}')
 server.admin('box.space._cluster:select{}')
 server.admin('box.space._space:select{}')
@@ -18,7 +18,7 @@ server.admin('box.space._user:select{}')
 server.admin('box.space._func:select{}')
 server.admin('box.space._priv:select{}')
 
-server.admin('dofile("%s/extra/schema_fill.lua")' % server.builddir)
+server.admin('dofile("%s/extra/schema_fill.lua")' % server.sourcedir)
 server.admin("box.snapshot()")
 server.restart()
 

test/lib/tarantool_server.py

@@ -378,6 +378,8 @@ class TarantoolServer(Server):
         ini.update(_ini)
         Server.__init__(self, ini)
         self.testdir = os.path.abspath(os.curdir)
+        self.sourcedir = os.path.abspath(os.path.join(os.path.basename(
+            sys.argv[0]), "..", ".."))
         self.re_vardir_cleanup += [
             "*.snap", "*.xlog", "*.inprogress",
             "*.sup", "*.lua", "*.pid"]