Test automation for hortonworks distro

HBase stop/start is not an init service in HDP.

Ambari must be installed for trafodion to recognize the distro.
At this point, the cluster is manual set-up, not ambari-managed.
So, disable the ambari check when determining whether to use trafodion
installer.

Fix syntax error when unsetting TOOLSDIR.

Change-Id: I925df2b1aaa27ff47b94d6fdc859d43535d92c59