CDAP-663 Implemented healthcheck for router and auth-server independent of the cdap-master.
Updated the comments.
Fixed code to handle the unsecure cdap case where status command goes to the HttpRequestHandler bypassing SecurityAuthenticationHttpHandler.
Merge branch 'develop' of https://github.com/caskdata/cdap into feature/cdap-679-healthcheck-router
Removed unused class
Removed unused class
Created new http handler for handling status requests and added it to the pipeline before SecurityAuthenticationHttpHandler and HttpRequestHandler.
Renamed handler.
Updated code to rename ProgramFlowUtils to Tasks.
Reordered the imports
Updated test case.
Removed unnecessary else condition.
Removed blank lines.
Getting port from server.getSocketAddress() now.
Merge branch 'develop' of https://github.com/caskdata/cdap into feature/cdap-679-healthcheck-router
Updated code to start/stop the server and ldap server only once during entire test.
Used Constants.Monitor.STATUS_OK instead of 'OK' string.
Merge pull request #659 from caskdata/feature/cdap-679-healthcheck-router

CDAP-663 Implemented healthcheck for router and auth-server.