git: use safe configparser for git submodules to prevent from errors on submodules with % sign.

- This is treated as interpolation sign and can cause errors on regular ConfigParser instance.

rhodecode/lib/vcs/backends/git/commit.py

@@ -472,7 +472,7 b' class GitCommit(base.BaseCommit):'
                 for line in _content.splitlines():
                     yield line
 
-            parser = configparser.ConfigParser()
+            parser = configparser.RawConfigParser()
             parser.read_file(iter_content(submodules_node.content))
 
             for section in parser.sections():