Fix defaulting of REMOTE_CEPH

A typo in lib/ceph was causing REMOTE_CEPH to be defaulted whenever
lib/ceph was sourced, regardless of its existing value. The
`trueorfalse` function takes a variable name as its second argument,
not a value.

Change-Id: Iec846e0b892eaa63a0a2a59aa045bc56d5606af1
diff --git a/lib/ceph b/lib/ceph
index a6b8cc8..251cfd1 100644
--- a/lib/ceph
+++ b/lib/ceph
@@ -71,7 +71,7 @@
 CEPH_REPLICAS_SEQ=$(seq ${CEPH_REPLICAS})
 
 # Connect to an existing Ceph cluster
-REMOTE_CEPH=$(trueorfalse False $REMOTE_CEPH)
+REMOTE_CEPH=$(trueorfalse False REMOTE_CEPH)
 REMOTE_CEPH_ADMIN_KEY_PATH=${REMOTE_CEPH_ADMIN_KEY_PATH:-$CEPH_CONF_DIR/ceph.client.admin.keyring}