Looking at the specs of your ESC, it seems that it falls just a bit short of what that servo is going to need:

From your ebay listing (ESC)

- BEC Output: 6V/1.5A.

From the servo listing
Operating voltage: 4.8V-6V
No loading current:0.25A(5V),0.30(6V)
Loading current:1.8A(5V),2.2(6V)

You'll see the loading current is a bit higher than what your BEC output is.
It's all based on how hard that servo is going to have to work... and it might not have to work very hard with all that torque and just little buggy wheels to move... but you never know.

It might very well work in practice, but on paper, it looks risky : P