Improve test coverage

[vazirim]

[JohnStarich]

Setting some coverage and task goals for us. We can track progress on codecov.

• [ ] #159 Run integration tests E2E on a real cluster
• [x] #170 Create test mocks for the bluemix-go SDK
• [x] #171 Binding controller to 85%
• [ ] #172 Configmap.go to 95%
• [ ] #173 Secret.go to 95%
• [x] #174 Service controller to 85%
• [x] #175 Token controller to 90%
• [ ] #176 internal/ibmcloud to 85%