Fix bug in setting PATH correctly.

This program was doing "which ssh_pw" to see if the PATH is set
correctly.  Unfortunately, tox copies that program such that we get
a false positive.  Expanded the test to this:

which process_plug_in_packages.py ssh_pw validate_plug_ins.py

Change-Id: I1c0022614f5f1eaae4545fc606a7e1a535f50a53
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
1 file changed