Update to Gerrit 2.9 API and use Java 7

Change-Id: I62bfe79e031782305da87db042eaef4bb489ad90
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

hooks-its/pom.xml

diff --git a/hooks-its/pom.xml b/hooks-its/pom.xml
index 3d0a3e8..a206459 100644
--- a/hooks-its/pom.xml
+++ b/hooks-its/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.googlesource.gerrit.plugins.its</groupId>
     <artifactId>hooks-its-parent</artifactId>
-    <version>2.8-SNAPSHOT</version>
+    <version>2.9-SNAPSHOT</version>
   </parent>
   <artifactId>hooks-its</artifactId>
   <name>Gerrit Code Review - Commit validation and Workflow</name>

pom.xml

diff --git a/pom.xml b/pom.xml
index c064c5f..600bff9 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,10 +22,10 @@
   <groupId>com.googlesource.gerrit.plugins.its</groupId>
   <artifactId>hooks-its-parent</artifactId>
   <packaging>pom</packaging>
-  <version>2.8-SNAPSHOT</version>
+  <version>2.9-SNAPSHOT</version>
 
   <name>Gerrit Code Review - Issue tracker support</name>
-  
+
   <properties>
     <easymockVersion>3.0</easymockVersion>
     <powermockVersion>1.5</powermockVersion>
@@ -253,8 +253,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>2.3.2</version>
         <configuration>
-          <source>1.6</source>
-          <target>1.6</target>
+          <source>1.7</source>
+          <target>1.7</target>
           <encoding>UTF-8</encoding>
         </configuration>
       </plugin>