Set version to 2.7-SNAPSHOT to match gerrit master

Change-Id: I0d5908b9435e8645892fcdfa6e701936e795dd94

pom.xml

diff --git a/pom.xml b/pom.xml
index 99b2d40..f1493fb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
   <artifactId>commit-message-length-validator</artifactId>
   <groupId>com.googlesource.gerrit.plugins.validators</groupId>
   <packaging>jar</packaging>
-  <version>1.0-SNAPSHOT</version>
+  <version>2.7-SNAPSHOT</version>
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>