Fix User and Repeat delay reversed

[sm-shaw]

User and repeat delay are reversed from what is documented. So User delay is repeat delay and vice versa. This PR modifies the options to be as documented. (By default they are both set to 500ms, so unlikely to be picked up in regualr testing).

Option	Description
User Delay(ms)	User Delay(ms) defines the time to wait a Virtual User will wait behind the previous Virtual User before starting its test, this is to prevent a login storm with all Virtual Users attempting to login at the same time.
Repeat Delay(ms)	Repeat Delay(ms) is the time that each Virtual User will wait before running its next Iteration of the Driver Script. For the TPROC-C workload this should be considered as an 'outer loop' to the 'inner loop' of the Total Transactions per User in the TPROC-C Driver Script.

[abondvt89]

Merging after reviews and approval of the three members of the code maintenance team.