Fix bug 1351655 and adding wrappers for uninstall

Fix for bug 1351655, script will look if cloudera has been installed and
skip the Cloudera install steps.

Wrapper scripts added for all uninstall scripts. Fixes for single node
uninstall also included.

Edit 1: Small changes suggested by reviewers.

Edit 2: Adding in other fixes.
trafodion_mods: Fix for bug 1353606
trafodion_setup: Copying trafodion_server* to trafodion_build.tgz and
putting into workding directory to be used by trafodion_mods.
traf_ambari_setup: Checking to see if Hortonworks/Ambari has previously
been installed.

Edit 3: Typo fix.

All uninstall scripts: Adding full path names for scripts.
Change-Id: Iab4584e29250ddc149e239c1269760e8fcfd83e3