[Drop Box] Allow Remove Manifestation from own Drop Box

Specify Creator and revise name provided for
automatically-created drop box, such that
applicable Remove Manifestation policies will
recognize that this is the user's own drop
box and permit removal therefrom.

This addresses the immediate cause of
nasa/mct#281.
[Drop Box] Use suffix from resource bundle

Use bundled suffix for user drop box in both
drop box creation and drop box removal policy,
to ensure that the two match. This mismatch
was a contributing factor in nasa/mct#281.
[Drop Box] Unit test createDropBox

Unit test createDropBox, specifically to verify
fix and detect regression for nasa/mct#281.
Merge pull request #282 from VWoeltjen/mct281

[Drop Box] Permit Remove Manifestation in own drop box