Unified Monitoring Agent enhancements for Japan East (Tokyo), South Korea Central (Seoul), and India West (Mumbai)

The following Unified Monitoring Agent changes have been implemented for Japan East (Tokyo), South Korea Central (Seoul), and India West (Mumbai):

• Added Ubuntu 16/18/20 support.
• Fixed the high CPU usage problem raised by the ruby.exe/ruby interpreter process.
• Added Custom Logs Monitoring agent configuration corruption checks.