Split the harmony SimpleDateFormatTest test methods up

Split the test_parseLjava_lang_StringLjava_text_ParsePosition
test method that is currently failing into smaller tests. That
should make it easier to isolate the problem and see which of
the many things tested in there are failing. This doesn't fix
any code but it does reveal that there are a number of
different tests failing.

As of this change the following tests are failing. That includes
the original test failure and some of the separate tests.

test_parseLjava_lang_StringLjava_text_ParsePosition
test_parse_W_w_dd_MMMM_yyyy_EEEE
test_parse_dayOfYearPatterns
test_parse_h_m_z
test_parse_h_z_2DigitOffsetFromGMT
test_parse_h_z_4DigitOffsetFromGMT
test_parse_h_z_4DigitOffsetNoGMT

Bug: 25998255
Change-Id: I0843f741eef7c3795d2e08f0139cba4ad8e1bd61