GITC: Pull GITC Manifest Dir from the config.

Updates the repo launcher and gitc_utils to pull the manifest
directory location out of the gitc config file.

Change-Id: Id08381b8a7d61962093d5cddcb3ff6afbb13004b
diff --git a/gitc_utils.py b/gitc_utils.py
index 4d8d536..d082c8d 100644
--- a/gitc_utils.py
+++ b/gitc_utils.py
@@ -20,13 +20,15 @@
 
 import git_command
 import git_config
+import wrapper
 
 
-# TODO (sbasi) - Remove this constant and fetch manifest dir from /gitc/.config
-GITC_MANIFEST_DIR = '/usr/local/google/gitc/'
 GITC_FS_ROOT_DIR = '/gitc/manifest-rw/'
 NUM_BATCH_RETRIEVE_REVISIONID = 300
 
+def get_gitc_manifest_dir():
+  return wrapper.Wrapper().get_gitc_manifest_dir()
+
 def parse_clientdir(gitc_fs_path):
   """Parse a path in the GITC FS and return its client name.