Problem: Unable to create non-Docker Group plugin alternative.

[tristanls]

Solution: Remove RPC server reflector check for Docker-specific "github.com/docker/infrakit/pkg/rpc" string in package path.

Resolves #389

[codecov-io]

Codecov Report

Merging #394 into master will increase coverage by 0.04%.

@@            Coverage Diff             @@
##           master     #394      +/-   ##
==========================================
+ Coverage   62.53%   62.57%   +0.04%     
==========================================
  Files          56       56              
  Lines        3136     3129       -7     
==========================================
- Hits         1961     1958       -3     
+ Misses        946      944       -2     
+ Partials      229      227       -2

Impacted Files	Coverage Δ
pkg/rpc/server/reflector.go	68.65% <ø> (+0.6%)	✅
pkg/rpc/server/info.go	81.81% <ø> (+2.4%)	✅

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[GordonTheTurtle]

Please sign your commits following these rules:
https://github.com/docker/docker/blob/master/CONTRIBUTING.md#sign-your-work
The easiest way to do this is to amend the last commit:

$ git clone -b "master" git@github.com:tristanls/infrakit.git somewhere
$ cd somewhere
$ git rebase -i HEAD~842354656528
editor opens
change each 'pick' to 'edit'
save the file and quit
$ git commit --amend -s --no-edit
$ git rebase --continue # and repeat the amend for each commit
$ git push -f

Amending updates the existing PR. You DO NOT need to open a new one.