Qa calls

Merging qa_calls into Master.
That may be true, but it's not testing this method. It's testing `Client#server`.

```ruby
# spec/code42/server_connection_string_spec.rb
require 'spec_helper'

module Code42
  describe ServerConnectionString do
    describe '#server' do
      it 'works' do
        expect { described_class.new.server }.to_not raise_error
      end
    end
  end
end
```

```
$ rspec ./spec/code42/server_connection_string_spec.rb 
Run options: include {:focus=>true}

All examples were filtered out; ignoring {:focus=>true}
F

Failures:

  1) Code42::ServerConnectionString#server works
     Failure/Error: expect { described_class.new.server }.to_not raise_error
       expected no Exception, got #<NameError: undefined local variable or method `server_id' for #<Code42::ServerConnectionString:0x007fcb32a5ad70>> with backtrace:
         # ./lib/code42/server_connection_string.rb:4:in `server'
         # ./spec/code42/server_connection_string_spec.rb:7:in `block (4 levels) in <module:Code42>'
         # ./spec/code42/server_connection_string_spec.rb:7:in `block (3 levels) in <module:Code42>'
     # ./spec/code42/server_connection_string_spec.rb:7:in `block (3 levels) in <module:Code42>'

Finished in 0.0024 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/code42/server_connection_string_spec.rb:6 # Code42::ServerConnectionString#server works
```