Add new oslo.privsep library to oslo repos

A new project olos.privsep has been created but failes sdvm testing as
even though the library is added ro PROJECTS and LIBS_FROM_GIT it isn't
installed by devstack.

Add oslo.privsep to the install_oslo function

Change-Id: Ia4d56747d56dcfe50889ebbdf9d553df13e1b950
diff --git a/tests/test_libs_from_pypi.sh b/tests/test_libs_from_pypi.sh
index 8e8c022..f31560a 100755
--- a/tests/test_libs_from_pypi.sh
+++ b/tests/test_libs_from_pypi.sh
@@ -41,7 +41,7 @@
 ALL_LIBS+=" python-neutronclient tooz ceilometermiddleware oslo.policy"
 ALL_LIBS+=" debtcollector os-brick automaton futurist oslo.service"
 ALL_LIBS+=" oslo.cache oslo.reports"
-ALL_LIBS+=" keystoneauth ironic-lib"
+ALL_LIBS+=" keystoneauth ironic-lib oslo.privsep"
 
 # Generate the above list with
 # echo ${!GITREPO[@]}