update to the latest gradle plugin.

Author: talregev

build.gradle

@@ -15,7 +15,7 @@
  */
 
 task wrapper(type: Wrapper) {
-  gradleVersion = '1.11'
+  gradleVersion = '2.2.1'
 }
 
 allprojects {

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=http\://services.gradle.org/distributions/gradle-1.11-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip

gradle_plugins/build.gradle

@@ -16,6 +16,7 @@
 
 apply plugin: 'groovy'
 
+//noinspection GroovyAssignabilityCheck
 dependencies {
     compile gradleApi()
     compile localGroovy()

gradle_plugins/src/main/groovy/org/ros/gradle_plugins/RosAndroid.groovy

@@ -11,7 +11,7 @@ class RosAndroidPlugin implements Plugin<Project> {
   void apply(Project project) {
     project.apply plugin: "ros"
     project.extensions.create("rosandroid", RosAndroidPluginExtension)
-    project.rosandroid.buildToolsVersion = "19.1.0"
+    project.rosandroid.buildToolsVersion = "21.1.2"
 
     /********************************************************************** 
      * Publishing - not we're using old style here. Upgrade to maven-publish

message_generation/build.gradle

@@ -14,6 +14,7 @@
  * the License.
  */
 
+//noinspection GroovyAssignabilityCheck
 dependencies {
   compile 'io.netty:netty:3.5.2.Final'
   compile 'com.google.guava:guava:12.0'
@@ -26,4 +27,6 @@ dependencies {
 }
 
 apply plugin: "application"
+
+//noinspection GroovyUnusedAssignment
 mainClassName = "org.ros.internal.message.GenerateInterfaces"