Require approval from someone other than PR author

[lkysow]

In Bitbucket cloud, the pull request author can approve their own pull
request. Ignore this approval.

Fixes #201

[codecov]

Codecov Report

Merging #202 into master will increase coverage by 0.25%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #202      +/-   ##
==========================================
+ Coverage   69.38%   69.64%   +0.25%     
==========================================
  Files          56       56              
  Lines        3126     3126              
==========================================
+ Hits         2169     2177       +8     
+ Misses        807      796      -11     
- Partials      150      153       +3

Impacted Files	Coverage Δ
server/events/vcs/bitbucketcloud/client.go	47.05% <100%> (+7.84%)	⬆️

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[teosoft123]

I think there might be a (debug) flag that allows approvals from the pull requestors. Might help with debugging for small teams.

[lkysow]

@teosoft123 do you mean that you'd like there to be a debug flag on the Atlantis side to disable requiring approvals?

[teosoft123]

@lkysow precisely. One can have it both ways. I'd have the flag to enable self-approvals so that default is what most people expect, disable them

[lkysow]

In that case I'd prefer the teams use an atlantis.yaml file to disable approvals for that specific repo. Also only bitbucket cloud supports self approvals.