(QENG-762) add support to beaker scp_to/scp_from to ignore files of ...

... certain name/type

- added support to scp_to for an ignore list of files/dirs.  Does not
  support globbing.
Merge pull request #330 from anodelman/scp-ignore

(QENG-762) add support to beaker scp_to/scp_from to ignore files of ...