Fix tests to use newer-style rhc invocations

Change to the newer invocation style, order arguments consistently, and
delete global variables with paths to deprecated rhc executables.
Add @not-enterprise tag to some tests

The tests marked are for cartridges that are not in OpenShift Enterprise
at this time: 10gen, MongoDB, NodeJS, and PhpMyAdmin.  Also disabled for
Enterprise are lifecycle tests for the Ruby 1.8 cartridge; these tests
need to be updated.
Merge pull request #916 from Miciah/devenv-fixes-2

Merged by openshift-bot