Decouple sample apps

- Each app can now independently specify ONOS version it needs.
- All apps depend on stable version
  except for onos-app-uiref  who has dependency to 1.9.0-SNAPSHOT

Change-Id: Ib4d39901269b036eae4ceae3c41a9c5ad1a29cc1
diff --git a/icona/pom.xml b/icona/pom.xml
index 372fb75..b75b0ef 100644
--- a/icona/pom.xml
+++ b/icona/pom.xml
@@ -21,15 +21,19 @@
 
     <parent>
         <groupId>org.onosproject</groupId>
-        <artifactId>onos-app-samples</artifactId>
-        <version>1.9.0-SNAPSHOT</version>
-        <relativePath>../pom.xml</relativePath>
+        <artifactId>onos-dependencies</artifactId>
+        <version>1.8.0</version>
+        <relativePath/><!-- parent is remote -->
     </parent>
 
     <artifactId>onos-icona</artifactId>
     <version>1.9.0-SNAPSHOT</version>
     <packaging>pom</packaging>
 
+    <properties>
+        <onos.version>1.8.0</onos.version>
+    </properties>
+
     <modules>
         <module>app</module>
         <module>domainmgr</module>