#32 Extra "static" generated for operations

[Cedric Dumoulin]

A Mof operation with a scope of "classifier_level" is
translated to a java operation with a "static"
modifier, even in the generated interface.
The generated interface doesn't compile because of
the static operation.
Checking the JSR040, a MOF operation with a scope of
"classifier_level" should generate an operation through
the "operation template", this later doesn't specify
any "static".

Proposed solution:
Remove the extra "static" generation.

Patch is attached