Revert "[maven-release-plugin] prepare release apache-hyracks-0.2.18"

This reverts commit e6af0eee8f27019c7cf2114e66572543bbe84d18.
diff --git a/hyracks-fullstack/algebricks/algebricks-examples/pom.xml b/hyracks-fullstack/algebricks/algebricks-examples/pom.xml
index 6ed0a94..9ba2e08 100644
--- a/hyracks-fullstack/algebricks/algebricks-examples/pom.xml
+++ b/hyracks-fullstack/algebricks/algebricks-examples/pom.xml
@@ -33,7 +33,7 @@
   <parent>
     <groupId>org.apache.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.18</version>
+    <version>0.2.18-SNAPSHOT</version>
   </parent>
 
   <licenses>