Remove unnecessary slash from ceilometer endpoint

The last slash in ceilometer endpoint is not needed, it should be
removed because it will generate redundant slash which has been
treated as a bug in ceilometer.

Change-Id: Ifcff9b63921f5b1dda667d8e77aab22ca2928a8b
Closes-Bug: #1271556
ref: https://review.openstack.org/#/c/63279/
Add get-pip.py/*.qcow2 to .gitignore

files/get-pip.py and *.qcow2 are installed by DevStack itself. So
we shouldn't manage it with the git repository.

Change-Id: Ib22ed814d3d3eb33ef3ff45874b0ff36b2036cf5
Kill process groups in screen_stop()

Previously only the top child process was killed, killing the process
group also takes all of the child processes with it.

Closes-bug: 1271889
Change-Id: If1864cc4f1944f417ea3473d81d8b6e8e40030c2
Merge "Kill process groups in screen_stop()"
Merge "Add get-pip.py/*.qcow2 to .gitignore"
Merge "Remove unnecessary slash from ceilometer endpoint"