Added tests to ensure that localized data is properly migrated.

Added tests to ensure that localized data is properly migrated.

The added tests must run in the order specified in the Makefile:
  o test-sqlite-cursor-posix-initial

    Creates an addressbook sorted in POSIX locale and asserts that
    contacts are sorted in basic POSIX locale

  o test-sqlite-cursor-en-US-migrated

    Loads the existing address book in en_US-UTF-8 locale and asserts
    that contacts are sorted in the en_US-UTF-8 locale

  o test-sqlite-cursor-posix-migrated

    Loads the existing address book in POSIX locale again and asserts
    that contacts are sorted in the POSIX locale