Resolved two issues and updated TestHelper class

h6. DVPL-4513: Get real time search job results throw invalid data
exception
* Messages now include actual and expected markup and--assuming the
reader in question has got ILineInfo support, line number and position.
* Does not currently apply to value conversion errors. We may wish to
fix this
later.
h6. DVPL-4513: Get real time search job results throw invalid data
exception
We no longer throw when we get nothing but a <results> tag. Expectation:
Users must check back with the server for previews until they start
getting results. I have not seen this ever takes more than four minutes.
H6. TestHelper class is now static and the Connect method is named
CreateService.