Added API for Add/Update Organization Membership. Refs[#238]

[Shwetakale]

• https://developer.github.com/v3/orgs/members/#add-or-update-organization-membership end point was missing in this Gem. Added grant_organization_membership method for this in orgs section.
  • example

    github = Github.new oauth_token: '...'
    github.orgs.members.grant_organization_membership 'org-name', 'member-name', {role: 'role'}

• role is optional and can be member / admin. default - member

[Shwetakale]

@peter-murach I added my credentials while testing this API locally to generate cassettes and they are passing locally but travis is failing.

What should I do to pass this build on travis?

[phoet]

@Shwetakale thx for implementing this.

i think you made a small mistake where <BASIC_AUTH> should be https://<BASIC_AUTH> in the first casette.

[Shwetakale]

@phoet Yup looks like. Thanks updated this PR :).

[phoet]

@Shwetakale there is a test failing just for the jruby test-suite. i'm assuming that there is an issue with the order of let and before in the grant_organization_membership_spec.rb.

i'd try moving the mock-request calls down into the describe blocks. there is also a after { reset_authentication_for(subject) } in the other spec files. don't know exactly if that is of interest here.

[Shwetakale]

@phoet Thanks. You are right Test case is only failing for JRuby and I don't think any issue of let and before filter. Will need to test it on JRuby.

[piotrmurach]

Thank you!