tests: fix MojDbLocale and add another locale test

- MojDbLocale was updated according to behavior of ICU 50.1.2 (test at
  51.1). Now only in fr_CA locale sorting of accents made in backward
  direction.
- added TextCollatorTest.accentsOrder to narrow down code invloved in
  locale collation logic down to MojDbTextCollator

Open-webOS-DCO-1.0-Signed-off-by: Nikolay Orliuk <norluk@luxoft.com>

Change-Id: I7cd801b2eeb478c6130b448a08f4f18249b717c0
Reviewed-on: https://g2g.palm.com/2667
Reviewed-by: Build Verification
Reviewed-by: Nikolay Orliuk <norluk@luxoft.com>
Tested-by: Nikolay Orliuk <norluk@luxoft.com>
Reviewed-by: Roger Stringer <roger.stringer@lge.com>