Add debtcollector to lib/oslo and stackrc

Ensure that the debtcollector library is pulled in
like the other oslo libraries so that devstack can
use it where appropriate.

Also fixes 'test_libs_from_pypi.sh' to not have a huge
single line of libraries; and splits it into multiple
lines so the diffs and code can be easily looked at.

Change-Id: I35ab0ed0e20b6092a41ecb3b6f1aaf0a05f5180e
diff --git a/stackrc b/stackrc
index e084d94..b2bc970 100644
--- a/stackrc
+++ b/stackrc
@@ -314,6 +314,10 @@
 GITREPO["cliff"]=${CLIFF_REPO:-${GIT_BASE}/openstack/cliff.git}
 GITBRANCH["cliff"]=${CLIFF_BRANCH:-master}
 
+# debtcollector deprecation framework/helpers
+GITREPO["debtcollector"]=${DEBTCOLLECTOR_REPO:-${GIT_BASE}/openstack/debtcollector.git}
+GITBRANCH["debtcollector"]=${DEBTCOLLECTOR_BRANCH:-master}
+
 # oslo.concurrency
 GITREPO["oslo.concurrency"]=${OSLOCON_REPO:-${GIT_BASE}/openstack/oslo.concurrency.git}
 GITBRANCH["oslo.concurrency"]=${OSLOCON_BRANCH:-master}