Duplicate content assist proposals for GroovyObject members

[eric-milles]

Noticed especially within a script -- groovy.lang.Script extends groovy.lang.GroovyObjectSupport -- there are duplicate content assist proposals for methods like getMetaClass. DefaultGroovyMethods and GroovyObjectSupport are both offering a method.

In cases such as this (especially for 0 parameter methods), category method proposals should be suppressed. I think DefaultGroovyMethods.getMetaClass is there for non-Groovy types that did not get GroovyObject interface at compile time.