ONOS-6758 Enable TLS by default for intra-cluster communication

Default key store location is config/onos.jks with password changeit

Change-Id: I07cbc09abb22fd8e98fe39a012ce0a65d17d8e39
diff --git a/tools/build/envDefaults b/tools/build/envDefaults
index 41a9503..fd282c9 100644
--- a/tools/build/envDefaults
+++ b/tools/build/envDefaults
@@ -51,3 +51,6 @@
 export ONOS_GROUP="${ONOS_GROUP:-sdn}"  # ONOS group on remote system
 export ONOS_PWD="rocks"                 # ONOS user password on remote system
 export ONOS_SCENARIOS=$ONOS_ROOT/tools/test/scenarios
+export ONOS_CLUSTER_KEY_FILE="/tmp/onos.jks"
+export ONOS_CLUSTER_KEY_PASSWORD="changeit"
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