Merged r12139, r12140 and r12141 from trunk to 2.3-stable (#14931)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@12144 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merged r12142 from trunk to 2.3-stable (#14931)

scm: git: change non ASCII user name variable to instance variable.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@12145 e93f8b46-1217-0410-a6f0-8f06a7374b81