v3.0.0.RC1

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Upgrading plugins from 3.0.0.M2

Required updates to build.gradle files

We now use Nebula Extra Configurations Gradle plugin for the "provided" Gradle configuration instead of rolling our own. This requires changes in build.gradle files in Grails plugin projects. The reason for this is that for some Gradle plugins, the plugins must be applied in a certain order. The idea, eclipse and maven-publish plugins should be applied before the provided-base plugin. The Grails Gradle plugin will now be applying provided-base internally so this means that idea, eclipse and maven-publish plugins should come before org.grails.grails-plugin.
Here's the commit to the profile to update build.gradle template.
The provided-base plugin gets applied now by the org.grails.grails-core project so that we can standardize on using one way to implement provided in Grails project builds.