Eliminate duplication of MethodDecl nonterminal by renaming the one associated with interface types.
Eliminate duplication of MethodDecl nonterminal by renaming
the one associated with interface types.

R=gri
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=15092
CL=15096

tav/go,tav/go,tav/go,tav/go,tav/go,tav/go,tav/go