Upgrade to Gradle 5.0 (#1444)

Also skip raspbian for gazebo.

simulation/frc_gazebo_plugins/build.gradle

@@ -5,6 +5,7 @@ apply plugin: 'cpp'
 apply plugin: "google-test"
 
 ext.skipAthena = true
+ext.skipRaspbian = true
 
 apply from: "${rootDir}/shared/config.gradle"
 

simulation/gz_msgs/build.gradle

@@ -9,6 +9,7 @@ description = "A C++ and Java library to pass FRC Simulation Messages in and out
 
 /* The simulation does not run on real hardware; so we always skip Athena */
 ext.skipAthena = true
+ext.skipRaspbian = true
 apply from: "${rootDir}/shared/config.gradle"
 
 /* Use a sort of poor man's autoconf to find the protobuf development

simulation/halsim_gazebo/build.gradle

@@ -4,6 +4,7 @@ apply plugin: 'edu.wpi.first.NativeUtils'
 apply plugin: 'cpp'
 
 ext.skipAthena = true
+ext.skipRaspbian = true
 ext.pluginName = 'halsim_gazebo'
 
 /* If gz_msgs or gazebo is not available, do not attempt a build */
@@ -33,11 +34,11 @@ if (!gazebo_version?.trim()) {
 evaluationDependsOn(":simulation:gz_msgs")
 def gz_msgs_project = project(":simulation:gz_msgs")
 
-tasks.whenTaskAdded { task ->
-    task.onlyIf { !gz_msgs_project.hasProperty('skip_gz_msgs') && !project.hasProperty('skip_frc_plugins') }
-}
+if (!gz_msgs_project.hasProperty('skip_gz_msgs') && !project.hasProperty('skip_frc_plugins')) {
 
-apply from: "${rootDir}/shared/plugins/setupBuild.gradle"
+    apply from: "${rootDir}/shared/plugins/setupBuild.gradle"
+
+}
 
 model {
     binaries {