Removes some ruby1.8 handling code.

git-svn-id: http://svn.redmine.org/redmine@13253 e93f8b46-1217-0410-a6f0-8f06a7374b81
Set appropriate default language.

git-svn-id: http://svn.redmine.org/redmine@13254 e93f8b46-1217-0410-a6f0-8f06a7374b81
Removes some ruby1.8 handling code.

git-svn-id: http://svn.redmine.org/redmine@13255 e93f8b46-1217-0410-a6f0-8f06a7374b81
Removes #respond_to?(:force_encoding) checks in SCM adapters.

git-svn-id: http://svn.redmine.org/redmine@13256 e93f8b46-1217-0410-a6f0-8f06a7374b81
Removes #respond_to?(:force_encoding) checks in functional tests.

git-svn-id: http://svn.redmine.org/redmine@13257 e93f8b46-1217-0410-a6f0-8f06a7374b81
Removes #respond_to?(:force_encoding) checks in integration tests.

git-svn-id: http://svn.redmine.org/redmine@13258 e93f8b46-1217-0410-a6f0-8f06a7374b81