NXCALS-738 Key/Value pairs now are sent as a single string under the format…

FIX THE MERGE CONFLICTS FIRST - jwozniak -> Done

When sending the query options to spark, the keys are converter into lower case values.

See:

• DataSource.scala
• CaseInsensitiveMap

This might cause problems when the user wants to query for case sensitive columns. To prevent it we will convert all keyValue pairs into a single String with the format key1=value1,key2=value2..., and add this value to a specific key in the query.