Update version strings for archetypes

Also, hooking learning-switch app into the Maven build

Change-Id: Ie4379bd170a066d8b7479d0db0c1ae24b80d766a
diff --git a/apps/learning-switch/pom.xml b/apps/learning-switch/pom.xml
index eab9ae0..407cd32 100644
--- a/apps/learning-switch/pom.xml
+++ b/apps/learning-switch/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <groupId>org.onosproject</groupId>
         <artifactId>onos-apps</artifactId>
-        <version>1.7.0-SNAPSHOT</version>
+        <version>1.8.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>