The file path was not properly passed to the '-x' test which caused it
to always return true.

This commit simplifies the test for existing command by relying only on
the exit code of `type` rather than checking that the file path is
executable.

Change-Id: Iaf47d92ff9fd1ef34d8d7492c08ec24d2b8a9536
Closes-Bug: #1635341

Keep consistent with other "if" condition
TrivialFix

Change-Id: I18fea71bd50729642543afd4d3bab0b7dfaecd3d

Correct relative path of kolla root directory after vagrant environment was
moved from dev/vagrant to contrib/dev/vagrant.

Closes-Bug: #1635329

Change-Id: Ib13a6123f34d69884e27029f5144ff1ad165e73e

TrivialFix

Change-Id: Ifb8f19afa1514488bd288670d08b96f84982a4e1