Don't commit if not changes

[mngan]

Peering Manager version

1.7.4

Python version

3.9

Steps to Reproduce

calling set_napalm_configuration(cfg, commit=True) will trigger a commit even if there are no changes.

Expected Behavior

Ideally, no commit should get triggered. Test if changes is not empty before committing in set_napalm_configuration

peering/models/models.py#L1289

                if commit and changes:
                    self.logger.debug(f"commiting configuration on {self.hostname}")
                    device.commit_config()
                else:
                    self.logger.debug(f"discarding configuration on {self.hostname}")
                    device.discard_config()

Observed Behavior

Commit history getting filled with hourly revisions with empty commits