Add cursive to LIBS_FROM_GIT

Allow cursive to be installed from git instead of pip.

The barbican-tempest-plugin, which uses cursive indirectly
through nova and glance, would benefit from the ability to
use cursive from git instead of pip.

Change-Id: Icae7d310f1ee392d080e7c8e421a26d7c0ef4727
diff --git a/lib/oslo b/lib/oslo
index 1a78bdf..8eada67 100644
--- a/lib/oslo
+++ b/lib/oslo
@@ -24,6 +24,7 @@
 # --------
 GITDIR["automaton"]=$DEST/automaton
 GITDIR["cliff"]=$DEST/cliff
+GITDIR["cursive"]=$DEST/cursive
 GITDIR["debtcollector"]=$DEST/debtcollector
 GITDIR["futurist"]=$DEST/futurist
 GITDIR["os-client-config"]=$DEST/os-client-config
@@ -72,6 +73,7 @@
 function install_oslo {
     _do_install_oslo_lib "automaton"
     _do_install_oslo_lib "cliff"
+    _do_install_oslo_lib "cursive"
     _do_install_oslo_lib "debtcollector"
     _do_install_oslo_lib "futurist"
     _do_install_oslo_lib "osc-lib"