Add --force flag to rmbucket

[romasku]

Closes #2396

[codecov]

Codecov Report

Merging #2495 (02730a2) into master (9eeb199) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2495   +/-   ##
=======================================
  Coverage   74.93%   74.93%           
=======================================
  Files          66       66           
  Lines       11067    11067           
  Branches     2145     2145           
=======================================
  Hits         8293     8293           
  Misses       2470     2470           
  Partials      304      304           

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