[api] Add enable and disable JTHA methods
[api] Add enable and disable JTHA methods

This change adds wrapper for the enable and disable jt ha methods.
I will be copying the tar to the systest dir in "cmf" repo and
testing it there.

justinhayes/cm_api,cdapio/cm_api,justinhayes/cm_api,cdapio/cm_api,justinhayes/cm_api,cloudera/cm_api,cdapio/cm_api,cloudera/cm_api,cloudera/cm_api,cdapio/cm_api