Add tests for system health

[bdzim]

These tests will show the health of the management vm. There will be a button to rerun the tests.

Tests

• Can we connect to the DB?
• Is the openmanage service running?
• Last LDAP Sync: we look in the log file for indication of a successful sync operation.
  • ''Successful sync operation'': We see a begin sync message in the logs, and find a matching completion tag.
• LDAP connectivity: Last LDAP sync operation ''did not'' fail out with an LDAP connectivity error.
• AccountsApi connectivity: Last AccountsApi operation ''did not'' fail out with a connection error.