Need to only sign artifacts during release.

Going to have to update upstream PlayN and ship a new release there too. Yay.
We need more chickens!

pom.xml

@@ -83,21 +83,6 @@
           <stagingProfileId>a00df38d03dd2c</stagingProfileId>
         </configuration>
       </plugin>
-
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-gpg-plugin</artifactId>
-        <version>3.1.0</version>
-        <executions>
-          <execution>
-            <id>sign-artifacts</id>
-            <phase>verify</phase>
-            <goals>
-              <goal>sign</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
     </plugins>
   </build>
 
@@ -116,6 +101,34 @@
       </modules>
     </profile>
 
+    <profile>
+      <id>release-sign-artifacts</id>
+      <activation>
+        <property><name>performRelease</name><value>true</value></property>
+      </activation>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-gpg-plugin</artifactId>
+            <version>1.6</version>
+            <executions>
+              <execution>
+                <id>sign-artifacts</id>
+                <phase>verify</phase>
+                <goals>
+                  <goal>sign</goal>
+                </goals>
+              </execution>
+            </executions>
+            <configuration>
+              <keyname>[email protected]</keyname>
+            </configuration>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+
     <profile>
       <id>deploy-local</id>
       <distributionManagement>