To better support unit tests, we should create a mock KMIP server that can generate certain outcomes for testing.

1. Create a KMIPServiceMock class that makes a mock version of KMIPService. It should inherit from KMIPService. The KMIPServiceMock should take an enum that indicates the failure that the KMIPService implements.
2. We should create two basic faults to start - KMIPSuccess (Create a new symmetric key for the class, use it to encrypt the value passed into encrypt) and KMIP Network Failure.
3. Add a virtual function on SLSLogEncryptorManager called createKMIPService. For SLSLogEncryptorManager, have that function call KMIPService::createKMIPService.
4. Add a subclass of SLSLogEncryptorManagerImpl called SLSLogEncryptorManagerImplMock. Have the class take an enum in the constructor and implement the createKMIPService function for SLSLogEncryptorManagerImplMock that creates a KMIPServiceMock.