GUACAMOLE-275: Automatically attempt to refresh browser cache if index.html does not match current build.

guacamole/pom.xml

@@ -154,6 +154,7 @@
                             <excludes>
                                 <exclude>translations/*.json</exclude>
                                 <exclude>index.html</exclude>
+                                <exclude>verifyCachedVersion.js</exclude>
                             </excludes>
                         </resource>
 
@@ -164,6 +165,7 @@
                             <includes>
                                 <include>translations/*.json</include>
                                 <include>index.html</include>
+                                <include>verifyCachedVersion.js</include>
                             </includes>
                         </resource>