[Bitbucket] Adding ability to fork a repo to a different project (#843)

* Adding new function/functionality to be able to fork a repo to a project
that differs from the original source project, which is what th existing
functionality is limited to.

* Ran black analyzer over code, fixed up the multiline function definition wrap

* Fixed up mismatch in parameter name

Author: zacaryc

atlassian/bitbucket/__init__.py

@@ -855,6 +855,22 @@ def fork_repository(self, project_key, repository_slug, new_repository_slug):
             body["project"] = {"key": project_key}
         return self.post(url, data=body)
 
+    def fork_repository_new_project(self, project_key, repository_slug, new_project_key, new_repository_slug):
+        """
+        Forks a repository to a separate project.
+        :param project_key: Origin Project Key
+        :param repository_slug: Origin repository slug
+        :param new_project_key: Project Key of target project
+        :param new_repository_slug: Target Repository slug
+        :return:
+        """
+        url = self._url_repo(project_key, repository_slug)
+        body = {}
+        if new_repository_slug is not None and new_project_key is not None:
+            body["name"] = new_repository_slug
+            body["project"] = {"key": new_project_key}
+        return self.post(url, data=body)
+
     def repo_keys(self, project_key, repo_key, start=0, limit=None, filter_str=None):
         """
         Get SSH access keys added to the repository