ONOS-6563 ONOS-6866 Draft porting of old ECMP P4 demo application

Also, pipeconf implementation for ecmp.p4

Change-Id: Ia8973b42ae386482e341c2b201ad887ad471091e
diff --git a/apps/pi-demo/ecmp/src/main/java/org/onosproject/pi/demo/app/ecmp/package-info.java b/apps/pi-demo/ecmp/src/main/java/org/onosproject/pi/demo/app/ecmp/package-info.java
new file mode 100644
index 0000000..0d70589
--- /dev/null
+++ b/apps/pi-demo/ecmp/src/main/java/org/onosproject/pi/demo/app/ecmp/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * PI demo app for the ECMP configuration.
+ */
+package org.onosproject.pi.demo.app.ecmp;
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