Filtered Mule-EE dependencies when muleEnterprise is set to false (CE environments)

By default, both CE and EE dependencies are used in the build (MulePlugin.groovy/providedCompile). This is not desirable when targeting an CE environment, and at least in my case the CE build doesn't even succeed with those dependencies enabled.

I Noticed that there is a readily available flag (MulePluginExtension.groovy/muleEnterprise) that would seem like a logic way of controlling these dependencies, so I made EE dependencies obey the muleEnterprise setting; when muleEnterprise is set to false, EE dependencies are not included.

B.R.
- Daniel Wellner