Improve messages, Add tests for login registries, Add alpine patch number #94

Job	Run time
shellcheck	8s
Run tests (gantry_cleanup_images_spec.sh)	2m 9s
Run tests (gantry_common_options_spec.sh)	2m 4s
Run tests (gantry_filters_spec.sh)	2m 17s
Run tests (gantry_login_negative_spec.sh)	1m 40s
Run tests (gantry_login_spec.sh)	2m 12s
Run tests (gantry_manifest_spec.sh)	2m 21s
Run tests (gantry_notify_spec.sh)	2m 25s
Run tests (gantry_parallel_spec.sh)	2m 11s
Run tests (gantry_rollback_spec.sh)	2m 10s
Run tests (gantry_service_multiple_spec.sh)	1m 41s
Run tests (gantry_service_no_running_tasks_spec.sh)	1m 32s
Run tests (gantry_service_single_spec.sh)	1m 41s
Run tests (gantry_update_options_spec.sh)	2m 26s
	26m 57s

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