Missing Grails Annotation in IntelliJ Groovy compiler

Running Compile or Make for a Grails 2 project gives different classes than Grails wrapper does. This makes Grails project to misbehave when using classes from IntelliJ out dir.

Full javap output of asset.pipeline.AssetsController in a stock "grails create-app" application (Grails 2.4.4, JDK 1.8.0_20) attached.
Difference in annotations is as follows.

Annotations in "target" directory:
```
...
#8 = Utf8 Lgrails/artefact/Enhanced;
...
#13 = Utf8 Lorg/codehaus/groovy/grails/plugins/metadata/GrailsPlugin;
...
RuntimeVisibleAnnotations:
0: #8(#9=s#10,#11=[s#12])
1: #13(#14=s#15,#9=s#16)
```
Annotations in "out" directory:
```
...
#8 = Utf8 Lgrails/artefact/Enhanced;
...
RuntimeVisibleAnnotations:
0: #8(#9=s#10,#11=[s#12])
```

---

*Imported from [IDEA-136644](https://youtrack.jetbrains.com/issue/IDEA-136644) · Type: Bug · Votes: 1*
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Reproduce the discrepancy by compiling or making a Grails 2.4.4 project in IntelliJ and comparing the resulting class in out with the Grails wrapper's class in target using javap. Trace the IntelliJ Groovy compiler path and its handling of Grails annotations, then verify that the generated class includes the missing GrailsPlugin annotation and matches the wrapper output.

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