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

This reverts commit ba7ed18443fb0789526f9d03af7aa34e953aaa6d.
diff --git a/algebricks/algebricks-tests/pom.xml b/algebricks/algebricks-tests/pom.xml
index f99a786..9a17ed4 100644
--- a/algebricks/algebricks-tests/pom.xml
+++ b/algebricks/algebricks-tests/pom.xml
@@ -25,7 +25,7 @@
   <parent>
     <groupId>org.apache.hyracks</groupId>
     <artifactId>algebricks</artifactId>
-    <version>0.2.18-SNAPSHOT</version>
+    <version>0.2.17-incubating</version>
   </parent>
 
   <licenses>
@@ -122,22 +122,22 @@
     <dependency>
       <groupId>org.apache.hyracks</groupId>
       <artifactId>algebricks-compiler</artifactId>
-      <version>0.2.18-SNAPSHOT</version>
+      <version>0.2.17-incubating</version>
     </dependency>
     <dependency>
       <groupId>org.apache.hyracks</groupId>
       <artifactId>hyracks-control-cc</artifactId>
-      <version>0.2.18-SNAPSHOT</version>
+      <version>0.2.17-incubating</version>
     </dependency>
     <dependency>
       <groupId>org.apache.hyracks</groupId>
       <artifactId>hyracks-control-nc</artifactId>
-      <version>0.2.18-SNAPSHOT</version>
+      <version>0.2.17-incubating</version>
     </dependency>
     <dependency>
       <groupId>org.apache.hyracks</groupId>
       <artifactId>hyracks-data-std</artifactId>
-      <version>0.2.18-SNAPSHOT</version>
+      <version>0.2.17-incubating</version>
     </dependency>
   </dependencies>
 </project>