Break the for loop searching after removing the item

When inserting a new HardwareConfig item, we will search the list to
find if it exists. If yes, remove it first then insert the new one.
The problem is that after removing it, we should break the for loop
searching else the size value is incorrect and cause
IndexOutOfBoundsException.

Test: manual, ran the test 30 times and it passed 30 times
Change-Id: I870eaa9be410e8e8b6c24ff748fb6c84c292c289