Push To LMS updates

Added tests
Converted scripts to django commands
Removed advanced module requirement
Generalized to platform
Switched to subprocess for shell commands
Beefed up resiliency and error checking.
Refactored since #1910 removed get_location_and_verify_access
Added settings to aws for export directory and reworked test setup and teardown
Several review based fixes
Added line to Changelog
Changed URL handler to be accepting and moved git bare repo inside of test_root/data
Added exception logging to help trace issues
Added output in exception logging
Made the branch to commit to explicit instead of implicit
Skipping git identity test on condition of global configuration set

cms/envs/test.py

@@ -37,6 +37,10 @@ STATIC_ROOT = TEST_ROOT / "staticfiles"
 GITHUB_REPO_ROOT = TEST_ROOT / "data"
 COMMON_TEST_DATA_ROOT = COMMON_ROOT / "test" / "data"
 
+# For testing "push to lms"
+FEATURES['ENABLE_PUSH_TO_LMS'] = True
+GIT_REPO_EXPORT_DIR = TEST_ROOT / "export_course_repos"
+
 # Makes the tests run much faster...
 SOUTH_TESTS_MIGRATE = False  # To disable migrations and use syncdb instead