Unified command execution and unit tests

- All arguments inits moved to own clases
- Added unified way to execute commands
- Unit test structure and very basic tests
- Command line script to test coverage
- Argument parsers moved to corresponding commands
- Automatic parsers and command mapping

Change-Id: Id099d14702d9590729583dfd9574bd57022efac5
Related-PROD: PROD-28199
diff --git a/cfg_checker/cli/network.py b/cfg_checker/cli/network.py
index b53311d..5c5a4e2 100644
--- a/cfg_checker/cli/network.py
+++ b/cfg_checker/cli/network.py
@@ -1,59 +1,12 @@
-import sys
-
-from cfg_checker.common import config, logger, logger_cli
-from cfg_checker.helpers.args_utils import MyParser
-
-from command import execute_command
+from command import cli_command
 
 
-def init_network_parser(_parser):
-    # network subparser
-    net_subparsers = _parser.add_subparsers(dest='type')
-
-    net_check_parser = net_subparsers.add_parser(
-        'check',
-        help="Do network check and print the result"
+def entrypoint():
+    cli_command(
+        "# Mirantis Cloud Network checker",
+        'network'
     )
 
-    net_check_parser.add_argument(
-        '--detailed',
-        action="store_true", default=False,
-        help="Print error details after summary"
-    )
-
-    net_report_parser = net_subparsers.add_parser(
-        'report',
-        help="Generate network check report"
-    )
-
-    net_report_parser.add_argument(
-        '--html',
-        metavar='network_html_filename',
-        help="HTML filename to save report"
-    )
-
-    return _parser
-
-
-def cli_network():
-    net_parser = MyParser("# Mirantis Cloud Network checker")
-    init_network_parser(net_parser)
-
-    # parse arguments
-    try:
-        args = net_parser.parse_args()
-    except TypeError:
-        logger_cli.info("\n# Please, check arguments")
-        sys.exit(0)
-
-    # force use of sudo
-    config.ssh_uses_sudo = True
-
-    # Execute the command
-    result = execute_command(args, 'network')
-    logger.debug(result)
-    sys.exit(result)
-
 
 if __name__ == '__main__':
-    cli_network()
+    entrypoint()