Move postgresql, mysql into Recommends section, closes #260

debian/control

@@ -58,12 +58,13 @@ Conflicts: tarantool-plugins (<< 1.5.3)
 Replaces: tarantool-plugins (<< 1.5.3)
 Architecture: i386 amd64 kfreebsd-i386 kfreebsd-amd64 hurd-i386
 Priority: optional
-Depends: ${shlibs:Depends}, ${misc:Depends},
- tarantool (= ${binary:Version}),
- tarantool-sql-module,
+Depends:
+ ${shlibs:Depends},
+ ${misc:Depends},
+ tarantool (= ${binary:Version})
+Recommends:
  tarantool-postgresql-module,
- tarantool-mysql-module,
- tarantool-sophia-module
+ tarantool-mysql-module
 Description: Tarantool in-memory database - all plug-ins bundle
  Tarantool is an in-memory database and Lua application server.
  This package provides (or depends on) all Tarantool additional