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

This reverts commit 1b18e778ed8c4028e80ec828c655523e5b2eff2b.
diff --git a/asterix-aql/pom.xml b/asterix-aql/pom.xml
index dbb354b..44e1770 100644
--- a/asterix-aql/pom.xml
+++ b/asterix-aql/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <artifactId>asterix</artifactId>
         <groupId>org.apache.asterix</groupId>
-        <version>0.8.9-SNAPSHOT</version>
+        <version>0.8.8-incubating</version>
     </parent>
 
     <licenses>
@@ -137,19 +137,19 @@
         <dependency>
             <groupId>org.apache.asterix</groupId>
             <artifactId>asterix-common</artifactId>
-            <version>0.8.9-SNAPSHOT</version>
+            <version>0.8.8-incubating</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.asterix</groupId>
             <artifactId>asterix-om</artifactId>
-            <version>0.8.9-SNAPSHOT</version>
+            <version>0.8.8-incubating</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.asterix</groupId>
             <artifactId>asterix-metadata</artifactId>
-            <version>0.8.9-SNAPSHOT</version>
+            <version>0.8.8-incubating</version>
             <scope>compile</scope>
         </dependency>
         <dependency>