IPP: disabled some functions

Disabled some IPP functions which break OCL accuracy tests with `test_loop_times=30`:
- `convertTo` (32f16s)
- `cvtColor` (BGR2HSV_FULL, RGBA2HSV_FULL,  BGRA2HSV_FULL, RGB2BGR565, BGRA2BGR565, RGBA2BGR565).

Fixed incorrect call of `IPPMorphReplicate` in case `BORDER_CONSTANT` and kernel size not equal to 3*3.

build_examples=OFF