New sample for appliance Health

updated Health appliance sample

cleaned up health appliance sample

Signed-off-by: aspurohit <spurohit@vmware.com>

Removed unused objects

Signed-off-by: aspurohit <spurohit@vmware.com>

modified as per sample_template_basic

updated as per review comments

updated the sample as per review comments

updated the sample as per import standards

samples/vsphere/appliances/health_messages.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python
+"""
+* *******************************************************
+* Copyright (c) VMware, Inc. 2019. All Rights Reserved.
+* SPDX-License-Identifier: MIT
+* *******************************************************
+*
+* DISCLAIMER. THIS PROGRAM IS PROVIDED TO YOU "AS IS" WITHOUT
+* WARRANTIES OR CONDITIONS OF ANY KIND, WHETHER ORAL OR WRITTEN,
+* EXPRESS OR IMPLIED. THE AUTHOR SPECIFICALLY DISCLAIMS ANY IMPLIED
+* WARRANTIES OR CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY,
+* NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE.
+"""
+
+__author__ = 'VMware, Inc.'
+__vcenter_version__ = '6.7+'
+
+from vmware.vapi.vsphere.client import create_vsphere_client
+
+from samples.vsphere.common import (sample_cli, sample_util)
+from samples.vsphere.common.ssl_helper import get_unverified_session
+
+
+class HealthMessages(object):
+    """
+    Demonstrates getting Health messages for memory, storage and cpu
+
+    Retrieves Health messages details from vCenter and prints the data
+
+    """
+
+    def __init__(self):
+        parser = sample_cli.build_arg_parser()
+
+        parser.add_argument(
+            '--item',
+            required=True,
+            action='store',
+            choices=['memory', 'cpu', 'storage'],
+            help='Specify the name of health item to view the messages')
+
+        args = sample_util.process_cli_args(parser.parse_args())
+        self.item = args.item
+        # Connect to vAPI services
+        session = get_unverified_session() if args.skipverification else None
+        self.client = create_vsphere_client(server=args.server,
+                                            username=args.username,
+                                            password=args.password,
+                                            session=session)
+
+    def run(self):
+        message_list = self.client.appliance.Health.messages(self.item)
+        print("Health Alarams")
+        print("-------------------\n")
+        if not message_list:
+            print("No health alarms for : " + self.item)
+        else:
+            for message in message_list:
+                print("Alert time : {}".format(message.time))
+                print("Alert message Id: " + message.id)
+                local_message = message.message
+                default_msg = local_message.default_message
+                print("Alert message : " + default_msg)
+
+
+def main():
+    health_sample = HealthMessages()
+    health_sample.run()
+
+
+if __name__ == '__main__':
+    main()