Add --dangerous flag for mc rb sitewide removal

[poornas]

No description provided.

[vadmeste]

LGTM & tested

[kannappanr]

 $ mc rb --dangerous --force myminio1
Bucket removed successfully `myminio1`.

Text needs to be changed.

[codecov]

Codecov Report

Merging #2709 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #2709      +/-   ##
==========================================
- Coverage   10.08%   10.08%   -0.01%     
==========================================
  Files         129      129              
  Lines       12283    12288       +5     
==========================================
  Hits         1239     1239              
- Misses      10877    10882       +5     
  Partials      167      167

Impacted Files	Coverage Δ
cmd/rb-main.go	0% <0%> (ø)	⬆️

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[kannappanr]

sorry for the nit pick, but the out put is now

$ mc rb --dangerous --force myminio1
Removed `myminio1/test` successfully.
Removed `myminio1/test1` successfully.
Removed `myminio1/test2` successfully.
Removed `myminio1` successfully.

It will be better if we do not display the last line, it gives an impression that we are removing the alias itself. Displaying the buckets might be good enough.

[poornas]

sorry for the nit pick, but the out put is now

$ mc rb --dangerous --force myminio1
Removed `myminio1/test` successfully.
Removed `myminio1/test1` successfully.
Removed `myminio1/test2` successfully.
Removed `myminio1` successfully.

It will be better if we do not display the last line, it gives an impression that we are removing the alias itself. Displaying the buckets might be good enough.

done.

[kannappanr]

LGTM