Replaced names with  correct conf files

In section 3, subsection b of trove install guide,
wrong config files were present earlier. Replaced
trove-api.conf with trove.conf and trove-taskmaster.conf
with trove-taskmanager.conf in all occurences

Change-Id: I0469c2f41e2cfbf99a6a0772c46c1c64307a49ab
Closes-Bug: #1326619
Merge "Replaced names with  correct conf files"