Revert "[maven-release-plugin] prepare release asterix-0.8.7-incubating"

This reverts commit 44ae40a100a77ddd03490c61330bc6f4eff94f4d.
diff --git a/asterix-runtime/pom.xml b/asterix-runtime/pom.xml
index 2a61330..bd89627 100644
--- a/asterix-runtime/pom.xml
+++ b/asterix-runtime/pom.xml
@@ -21,7 +21,7 @@
 	<parent>
 		<artifactId>asterix</artifactId>
 		<groupId>org.apache.asterix</groupId>
-		<version>0.8.7-incubating</version>
+		<version>0.8.7-SNAPSHOT</version>
 	</parent>
 	<artifactId>asterix-runtime</artifactId>
 
@@ -50,7 +50,7 @@
 	      	<plugin>
 	        	<groupId>org.apache.asterix</groupId>
 	        	<artifactId>lexer-generator-maven-plugin</artifactId>
-	        	<version>0.8.7-incubating</version>
+	        	<version>0.8.7-SNAPSHOT</version>
 	        	<configuration>
 	        	  	<grammarFile>src/main/resources/adm.grammar</grammarFile>
 	        	  	<outputDir>${project.build.directory}/generated-sources/org/apache/asterix/runtime/operators/file/adm</outputDir>
@@ -147,13 +147,13 @@
 		<dependency>
 			<groupId>org.apache.asterix</groupId>
 			<artifactId>asterix-om</artifactId>
-			<version>0.8.7-incubating</version>
+			<version>0.8.7-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.asterix</groupId>
 			<artifactId>asterix-fuzzyjoin</artifactId>
-			<version>0.8.7-incubating</version>
+			<version>0.8.7-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
@@ -163,7 +163,7 @@
 		<dependency>
 			<groupId>org.apache.asterix</groupId>
 			<artifactId>asterix-transactions</artifactId>
-			<version>0.8.7-incubating</version>
+			<version>0.8.7-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>