refactor DataPipeline format conversion, allowing for arrays of refs
[aws|elb] Mimic create_load_balancer mock

Mimic behaviour like the real one, as a availability_zones can be nil
and not when mocking.
Merge pull request #2499 from mattgillooly/aws_data_pipeline_allows_array_refs

refactor DataPipeline format conversion, allowing for arrays of refs
Merge pull request #2500 from josacar/master

[aws|elb] Mimic real behavior in create_load_balancer mock
add CONTRIBUTORS, assign copyright
fix link in license
Fixing defect with handling of multiple <item> elements in reponse to describe-reservations
Merge pull request #2504 from BrindleFly/master

Fixing defect with handling of multiple <item>
[aws|elb] compact possible nil

forces jruby/1.8 to behave more like 1.9+
[google] Excon::Errors::NotFound never reaches the models

Use Fog::Errors::NotFound as raised by build_excon_response
Merge pull request #2503 from maestrodev/google-not-found

[google|compute] Rescue from Fog::Errors::NotFound instead of Excon
fix error - invalid excon request keys: :host
make test output more verbose if provider service is unavailable
mock tests doesn't have to rely on provider availability
Merge pull request #2505 from nathwill/fix-bluebox-excon-host-error

fix error - 'invalid excon request keys: :host' for bluebox
Merge pull request #2508 from allomov/test-more-verbose

Make test output more verbose if Provider is not available for live tests.
Add Ruby 2.1.0 to the test matrix
Merge pull request #2511 from petergoldstein/feature/add_ruby_2_1_0_to_travis

Add Ruby 2.1.0 to the test matrix
ignore more Ruby version manager files

Both rbenv and rvm now generate some files that have no bearing on
the project, and leave the local repo in a dirty state.
drop dependency on deprecated ruby-hmac gem, fixes #2034

Ruby 1.8 compiled against OpenSSL 0.9.8 supports SHA256 for some time now.
Ref: https://github.com/ruby/ruby/blob/ruby_1_8_7/ChangeLog#L12025-L12029