RELEASE:Set next development version of parent pom

Author: Roman Iuvshin

pom.xml

@@ -16,7 +16,7 @@
     <parent>
         <artifactId>che-parent</artifactId>
         <groupId>org.eclipse.che</groupId>
-        <version>5.0.0</version>
+        <version>5.1.0-SNAPSHOT</version>
     </parent>
     <groupId>com.codenvy.che.installer</groupId>
     <artifactId>eclipse-che-installer-parent</artifactId>