(QENG-1128) Beaker no long auto recursively scps directories...

to systems under test

- issue was :recursive variable was being carried over successive calls
  to scp_to.  To prevent this, just set it based upon the file type
  being called
Merge pull request #450 from anodelman/scp-repair

(QENG-1128) Beaker no long auto recursively scps directories to systems under test