Fix a typo using GitKnowledgeRepository.git_has_remote, whereby the l…

…ogic required the boolean value to be negated.

knowledge_repo/repositories/gitrepository.py

@@ -365,7 +365,7 @@ def _add_cleanup(self, kp, path, update=False, branch=None, squash=False, messag
             raise e
 
     def _submit(self, path=None, branch=None, force=False):
-        if self.git_has_remote:
+        if not self.git_has_remote:
             raise RuntimeError("Could not find remote repository `{}` into which this branch should be submitted.".format(self.config.remote_name))
         if branch is None and path is None:
             raise ValueError("To submit a knowledge post, a path to the post and/or a git branch must be specified.")