ONOS-1328 Converted ONOS features to apps.

ONOS_FEATURES env. var is now deprecated!

Cells are expected to use ONOS_APPS env. var to tailor which builtin apps should be activated by default.  All builtin apps are installed by default, but can be uninstalled if desired.

Cleaned up cell definitions accordingly.

Change-Id: If3bb4691a73543a69197f4bf1855c8368f558450
diff --git a/tools/test/cells/ec2 b/tools/test/cells/ec2
index 204988e..ff7d08d 100644
--- a/tools/test/cells/ec2
+++ b/tools/test/cells/ec2
@@ -1,4 +1,4 @@
-# Bare metal cluster
+# EC2-based cluster (7-node)
 # Use the 10G NIC for cluster communications
 export ONOS_NIC="192.168.200.*"
@@ -15,6 +15,4 @@
 export OC6=
 export OC7=
-export OCI=${OC1}
-export ONOS_FEATURES=webconsole,onos-api,onos-core,onos-cli,onos-rest,onos-null
+export ONOS_APPS=null,intentperf