Implement Pump instance variables as properties

[mconlon17]

Properties have getters and setters than can be used to control how parameter information is made available to the Pump and to insure internal consistency in the instance variables.

Create a query environment, similar to the logging environment, that the pump can use. Pump should assume a query environment, not define it

[mconlon17]

Calling sequence is down to the two file names. The rest are simple instance variables. Still to do:

• replace file name parameters with file parameters, as properties
• replace query parms with query object with its own instance variables