Handle sub-patch versioning

Currently the code only handles x.y.z but
there is a possibility that Gerrit has the fourth versioning.
During such occasion the checking will fail entirely.

This patch add an optional fourth versioning number.

Change-Id: I80e7de197d13008ec3d478be84ef7a3e5426a612
Signed-off-by: Ardo Septama <aseptama@gmail.com>

src/main/java/com/googlesource/gerrit/plugins/importer/GerritApi.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/importer/GerritApi.java b/src/main/java/com/googlesource/gerrit/plugins/importer/GerritApi.java
index 88cddce..cbfc5df 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/importer/GerritApi.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/importer/GerritApi.java
@@ -82,22 +82,25 @@
     final Integer major;
     final Integer minor;
     final Integer patch;
+    final Integer revision;
     final String qualifier;
 
     Version(String formatted) {
       this.formatted = formatted;
 
-      Matcher m = Pattern.compile("(\\d+)\\.(\\d+)(\\.(\\d+))?(-(.+))?")
+      Matcher m = Pattern.compile("(\\d+)\\.(\\d+)(\\.(\\d+))?(\\.(\\d+))?(-(.+))?")
           .matcher(formatted);
       if (m.matches()) {
         this.major = Integer.parseInt(m.group(1));
         this.minor = Integer.parseInt(m.group(2));
         this.patch = m.group(3) != null ? Integer.parseInt(m.group(4)) : null;
-        this.qualifier = m.group(5) != null ? m.group(6) : null;
+        this.revision = m.group(5) != null ? Integer.parseInt(m.group(6)) : null;
+        this.qualifier = m.group(7) != null ? m.group(8) : null;
       } else {
         this.major = null;
         this.minor = null;
         this.patch = null;
+        this.revision = null;
         this.qualifier = null;
       }
     }