Update Gerrit API version to 2.8.1 in pom files

Update the version in the GWT plugin API and plugin
archetypes.

Change-Id: I6dad48410f5ac1ab8e5de4977e8acc0766cb0445

gerrit-plugin-archetype/pom.xml

diff --git a/gerrit-plugin-archetype/pom.xml b/gerrit-plugin-archetype/pom.xml
index f2cffa7..6d2a844 100644
--- a/gerrit-plugin-archetype/pom.xml
+++ b/gerrit-plugin-archetype/pom.xml
@@ -20,7 +20,7 @@
 
   <groupId>com.google.gerrit</groupId>
   <artifactId>gerrit-plugin-archetype</artifactId>
-  <version>2.8</version>
+  <version>2.8.1</version>
   <name>Gerrit Code Review - Plugin Archetype</name>
 
   <properties>

gerrit-plugin-gwt-archetype/pom.xml

diff --git a/gerrit-plugin-gwt-archetype/pom.xml b/gerrit-plugin-gwt-archetype/pom.xml
index b8152d1..8240a73 100644
--- a/gerrit-plugin-gwt-archetype/pom.xml
+++ b/gerrit-plugin-gwt-archetype/pom.xml
@@ -20,7 +20,7 @@
 
   <groupId>com.google.gerrit</groupId>
   <artifactId>gerrit-plugin-gwt-archetype</artifactId>
-  <version>2.8</version>
+  <version>2.8.1</version>
   <name>Gerrit Code Review - Web Ui GWT Plugin Archetype</name>
 
   <properties>

gerrit-plugin-gwtui/pom.xml

diff --git a/gerrit-plugin-gwtui/pom.xml b/gerrit-plugin-gwtui/pom.xml
index 0e2c155..686466d 100644
--- a/gerrit-plugin-gwtui/pom.xml
+++ b/gerrit-plugin-gwtui/pom.xml
@@ -21,7 +21,7 @@
 
   <groupId>com.google.gerrit</groupId>
   <artifactId>gerrit-plugin-gwtui</artifactId>
-  <version>2.8</version>
+  <version>2.8.1</version>
   <name>Gerrit Code Review - Plugin GWT UI</name>
 
   <description>

gerrit-plugin-js-archetype/pom.xml

diff --git a/gerrit-plugin-js-archetype/pom.xml b/gerrit-plugin-js-archetype/pom.xml
index ffb5937..c2fe7aa 100644
--- a/gerrit-plugin-js-archetype/pom.xml
+++ b/gerrit-plugin-js-archetype/pom.xml
@@ -20,7 +20,7 @@
 
   <groupId>com.google.gerrit</groupId>
   <artifactId>gerrit-plugin-js-archetype</artifactId>
-  <version>2.8</version>
+  <version>2.8.1</version>
   <name>Gerrit Code Review - Web UI JavaScript Plugin Archetype</name>
 
   <properties>