AC-771 fixed the ill formed provider fields

[dino-saurabh]

Description of what I changed

Corrected the ill formed provider that was being communicated to the servers earlier resulting in internal server error code ie 500 being returned.

Issue I worked on

JIRA Issue: https://issues.openmrs.org/browse/AC-771

Checklist: I completed these to help reviewers :)

• My pull request only contains ONE single commit
  (the number above, next to the 'Commits' tab is 1).

• I have added tests to cover my changes. (If you refactored
  existing code that was well tested you do not have to add tests)

• All new and existing tests passed.

• My pull request is based on the latest changes of the master branch.

[dino-saurabh]

@f4ww4z Sir please review.

[codecov-commenter]

Codecov Report

Merging #751 into master will increase coverage by 0.03%.
The diff coverage is 55.55%.

@@            Coverage Diff             @@
##           master     #751      +/-   ##
==========================================
+ Coverage   11.83%   11.86%   +0.03%     
==========================================
  Files         237      237              
  Lines       10576    10582       +6     
  Branches     1018     1018              
==========================================
+ Hits         1252     1256       +4     
- Misses       9242     9244       +2     
  Partials       82       82              

Impacted Files	Coverage Δ
...agerdashboard/addprovider/AddProviderFragment.java	0.00% <0.00%> (ø)
...penmrs/mobile/api/retrofit/ProviderRepository.java	27.27% <0.00%> (-0.86%)	⬇️
...gerdashboard/addprovider/AddProviderPresenter.java	97.05% <100.00%> (+0.39%)	⬆️

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[f4ww4z]

Looks good @LuGO0