Add new maintainer Han-Wen Nienhuys as developer in pom.xml files

Change-Id: I9069a720bdf6081d1793621e5fde8d6614c98c71
diff --git a/gerrit-acceptance-framework/pom.xml b/gerrit-acceptance-framework/pom.xml
index 9de0633..678d5ea 100644
--- a/gerrit-acceptance-framework/pom.xml
+++ b/gerrit-acceptance-framework/pom.xml
@@ -44,6 +44,9 @@
       <name>Edwin Kempin</name>
     </developer>
     <developer>
+      <name>Han-Wen Nienhuys</name>
+    </developer>
+    <developer>
       <name>Hugo Arès</name>
     </developer>
     <developer>
diff --git a/gerrit-extension-api/pom.xml b/gerrit-extension-api/pom.xml
index d7be38d..36f8d3a 100644
--- a/gerrit-extension-api/pom.xml
+++ b/gerrit-extension-api/pom.xml
@@ -44,6 +44,9 @@
       <name>Edwin Kempin</name>
     </developer>
     <developer>
+      <name>Han-Wen Nienhuys</name>
+    </developer>
+    <developer>
       <name>Hugo Arès</name>
     </developer>
     <developer>
diff --git a/gerrit-plugin-api/pom.xml b/gerrit-plugin-api/pom.xml
index d414b78..f9f5db6 100644
--- a/gerrit-plugin-api/pom.xml
+++ b/gerrit-plugin-api/pom.xml
@@ -44,6 +44,9 @@
       <name>Edwin Kempin</name>
     </developer>
     <developer>
+      <name>Han-Wen Nienhuys</name>
+    </developer>
+    <developer>
       <name>Hugo Arès</name>
     </developer>
     <developer>
diff --git a/gerrit-plugin-gwtui/pom.xml b/gerrit-plugin-gwtui/pom.xml
index a8f149c..7dcfdd5 100644
--- a/gerrit-plugin-gwtui/pom.xml
+++ b/gerrit-plugin-gwtui/pom.xml
@@ -44,6 +44,9 @@
       <name>Edwin Kempin</name>
     </developer>
     <developer>
+      <name>Han-Wen Nienhuys</name>
+    </developer>
+    <developer>
       <name>Hugo Arès</name>
     </developer>
     <developer>
diff --git a/gerrit-war/pom.xml b/gerrit-war/pom.xml
index 9bdb5d0..f88b638 100644
--- a/gerrit-war/pom.xml
+++ b/gerrit-war/pom.xml
@@ -44,6 +44,9 @@
       <name>Edwin Kempin</name>
     </developer>
     <developer>
+      <name>Han-Wen Nienhuys</name>
+    </developer>
+    <developer>
       <name>Hugo Arès</name>
     </developer>
     <developer>