Change glance default back to WSGI mode

The situation around glance under WSGI has changed a lot in a week.
We can now run tasks and imports under WSGI, so let's switch the
default back so that glance is consistent (by default) with the
other projects.

Change-Id: I3ae285b2ac4972c0b8abaccfc7c0ede0e1c49bf1
diff --git a/lib/glance b/lib/glance
index a848fc7..c2a8b74 100644
--- a/lib/glance
+++ b/lib/glance
@@ -70,7 +70,7 @@
 if [[ "$WSGI_MODE" != "uwsgi" ]]; then
     GLANCE_STANDALONE=True
 fi
-GLANCE_STANDALONE=${GLANCE_STANDALONE:-True}
+GLANCE_STANDALONE=${GLANCE_STANDALONE:-False}
 
 # File path for each store specified in GLANCE_MULTIPLE_FILE_STORES, the store
 # identifier will be appended to this path at runtime. If GLANCE_MULTIPLE_FILE_STORES