cpplint: Prevent cpplint from processing the MOdules directory
cpplint: Prevent cpplint from processing the MOdules directory

cpplint currently recurses down the Modules directory, but Modules
are not required to conform to our coding standards. This results in
excessive error reporting; complicating any attempt to fix or triage
cpplint errors. This commit prevents cpplint from recursing down the
Modules subdirectory.

simquest/opensurgsim,simquest/opensurgsim,simquest/opensurgsim,simquest/opensurgsim