Update RSpec version to >= 2.14.0 and convert specs to new syntax

[loganhasson]

This conversion is done by Transpec 1.13.1 with the following command: transpec

• 14 conversions from: == expected to: eq(expected)
• 14 conversions from: obj.should to: expect(obj).to
• 14 conversions from: obj.should_receive(:message) to: expect(obj).to receive(:message)
• 1 conversion from: obj.should_not_receive(:message) to: expect(obj).not_to receive(:message)