ugrade gradle to v4 and raml-cop to v5.

This is a big bump for gradle, projects which utilize this version will likely need to upgrade their plugins and check their build still works.

Author: joshzamor

Dockerfile

@@ -15,7 +15,7 @@ RUN apk update && \
   pip install --upgrade pip && \
   pip install transifex-client && \
   mkdir bin && \
-  npm install -g raml-cop@3.0.0 && \
+  npm install -g raml-cop@5.0.0 && \
   /bin/sh install_gradle.sh
 
 WORKDIR /app

install_gradle.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-wget -O gradle.zip http://services.gradle.org/distributions/gradle-2.13-bin.zip
+wget -O gradle.zip http://services.gradle.org/distributions/gradle-4.0-bin.zip
 unzip gradle.zip
 rm gradle.zip
-ln -s "$HOME/gradle-2.13/bin/gradle" /sbin/gradle
+ln -s "$HOME/gradle-4.0/bin/gradle" /sbin/gradle