Change order of openflow app dependencies.

Fixes ONOS-5196 where flows for packet requests weren't removed on deactivate
because the device provider deactivated before the others and the flows
could no longer be removed from the flow store.

Change-Id: I79445f5048b21c10e49d4f30d33a5b5a267a9afc

 APPS = [
-    'org.onosproject.openflow-base',
     'org.onosproject.hostprovider',
     'org.onosproject.lldpprovider',
+    'org.onosproject.openflow-base',
 ]
 
 onos_app (

@@ -33,9 +33,9 @@
         <onos.app.title>OpenFlow Meta App</onos.app.title>
         <onos.app.category>Provider</onos.app.category>
         <onos.app.requires>
-            org.onosproject.openflow-base,
             org.onosproject.hostprovider,
-            org.onosproject.lldpprovider
+            org.onosproject.lldpprovider,
+            org.onosproject.openflow-base
         </onos.app.requires>
         <onos.app.url>
             https://wiki.onosproject.org/display/ONOS/Application+Subsystem