The GC3Pie job controller does not need to be a hidden file.

(cherry picked from commit 3d1d1a8841bd492feddacb0e3d634664be98678d)
Update the GC3 controller with the latest changes: executable, hucore, etc.

- Note that the name GC3 is mispelled across the code. A later commit will fix this.

(cherry picked from commit f9eb0a8bcf0301abde8cd57761455198cedc46a0)