Adding office DHCP config

Change-Id: I91fd00eab5153ab4a53856dff7b58846feab1b4d
diff --git a/tools/test/cells/office b/tools/test/cells/office
index 2e282c6..c8dc599 100644
--- a/tools/test/cells/office
+++ b/tools/test/cells/office
@@ -4,5 +4,5 @@
 export OC1="10.1.10.223"
 
 unset ONOS_USE_SSH
-export ONOS_APPS="drivers,openflow,fwd,proxyarp,mobility"
+export ONOS_APPS="drivers,openflow,fwd,proxyarp,mobility,dhcp"