- Removed OS_Tick2Micros implementation, tests, stubs, references
- Moved prototype from API to internal for OS_Milli2Ticks
- Updated OS_Milli2Ticks to return status
- Added check for rollover in OS_Milli2Ticks
- OS_Milli2Ticks now sets and limits ticks as int
- Updated all internal use of OS_Milli2Ticks to check for error
  and returns immediately on error (won't wait maximum amount)
- Coverage tests updated to check for new error cases
- OS_Milli2Ticks stub updated (default implementation)

Fix #104, Remove OS_Tick2Micros and internalize OS_Milli2Ticks

Fix #604, Add ut_assert address equal macro