Bump used gerrit API to version 2.8-SNAPSHOT

Since current gerrit-plugin-api-2.8-SNAPSHOT does not come with
gerrit-pgm, we have to add it for now to be able to build. We can
remove that dependency again, once gerrit upstream includes gerrit-pgm
in gerrit-plugin-api again.

Change-Id: I58c3534765180bcc710c95449630095983729274

hooks-its/pom.xml

diff --git a/hooks-its/pom.xml b/hooks-its/pom.xml
index 12c259b..19dd5d3 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>2.7-SNAPSHOT</version>
+    <version>2.8-SNAPSHOT</version>
   </parent>
   <artifactId>hooks-its</artifactId>
   <name>Gerrit Code Review - Commit validation and Workflow</name>
@@ -37,6 +37,11 @@
       <version>${project.version}</version>
     </dependency>
     <dependency>
+      <groupId>com.google.gerrit</groupId>
+      <artifactId>gerrit-pgm</artifactId>
+      <version>${project.version}</version>
+    </dependency>
+    <dependency>
       <groupId>org.apache.velocity</groupId>
       <artifactId>velocity</artifactId>
       <version>${velocityVersion}</version>

pom.xml

diff --git a/pom.xml b/pom.xml
index bdd790e..c064c5f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
   <groupId>com.googlesource.gerrit.plugins.its</groupId>
   <artifactId>hooks-its-parent</artifactId>
   <packaging>pom</packaging>
-  <version>2.7-SNAPSHOT</version>
+  <version>2.8-SNAPSHOT</version>
 
   <name>Gerrit Code Review - Issue tracker support</name>