Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit ba7ed18443fb0789526f9d03af7aa34e953aaa6d.
diff --git a/hyracks/hyracks-api/pom.xml b/hyracks/hyracks-api/pom.xml
index c4efe85..8df6e64 100644
--- a/hyracks/hyracks-api/pom.xml
+++ b/hyracks/hyracks-api/pom.xml
@@ -24,7 +24,7 @@
   <parent>
     <groupId>org.apache.hyracks</groupId>
     <artifactId>hyracks</artifactId>
-    <version>0.2.18-SNAPSHOT</version>
+    <version>0.2.17-incubating</version>
   </parent>
 
   <licenses>
@@ -79,7 +79,7 @@
   	<dependency>
   		<groupId>org.apache.hyracks</groupId>
   		<artifactId>hyracks-ipc</artifactId>
-  		<version>0.2.18-SNAPSHOT</version>
+  		<version>0.2.17-incubating</version>
   	</dependency>
   	<dependency>
   		<groupId>org.apache.commons</groupId>