Add posibility to set compare type in Gerrit triggers

Change-Id: Ifb01f99771eb48793eefeb78fd43bf2c0bc91a5c
diff --git a/jenkins/files/jobs/_common.xml b/jenkins/files/jobs/_common.xml
index 725ec00..b7bca93 100644
--- a/jenkins/files/jobs/_common.xml
+++ b/jenkins/files/jobs/_common.xml
@@ -47,7 +47,7 @@
           <gerritProjects>
             {%- for pname, project in trigger.project.iteritems() %}
             <com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.data.GerritProject>
-              <compareType>PLAIN</compareType>
+              <compareType>{{ project.compare_type|default("PLAIN") }}</compareType>
               <pattern>{{ project.name|default(pname) }}</pattern>
               <branches>
                 {%- for branch in project.branches %}