AlphaGuid: Logic for generating unique alpha strings. This will be unique across all users and all tests

a. Part 1: Convert load test user number 1-45,000 to base 26, which will be 3 characters padded with As in front for strings less than 3. A is like 0.

b. Part 2 : Take the number of seconds from 2017-01-01 12:00 am, remove the least significant digit if possible, and convert to base 26 letters (A=0, Z=26). This will be about 5-6 characters long.

c. part 1 appended with part 2 = NumGUID