jp2openjpeg test 8 triggers jpeg assertion and exits testsuite

[landry]

running gdalautotest with 2.1.0 on OpenBSD, using openjpeg 2.1.0, jpeg (turbo) 1.4.2 and jasper 1.900.1 - it fails on test 8 for jpeg2000 driver.

  TEST: jpeg2000_8 ... Warning 1: Unable to find driver JP2ECW to unload from GDAL_SKIP environment variable.
Warning 1: Unable to find driver JP2MRSID to unload from GDAL_SKIP environment variable.
Warning 1: Unable to find driver JP2KAK to unload from GDAL_SKIP environment variable.
assertion "dec->numcomps == 3" failed: file "jpc_dec.c", line 1072, function "jpc_dec_tiledecode"
Abort trap (core dumped) 

As explained in the comment in ​https://trac.osgeo.org/gdal/browser/trunk/autotest/gdrivers/jpeg2000.py#L178, i'd expect the test to fail - but not for it to kill the whole testsuite.

[landry]

test 11 also triggers the same exception

[landry]

After digging into it, i'm going to apply the debian jasper patch to fix the assert in jasper and retest the whole thing, but this failure shouldnt abort the testsuite..

[Even Rouault]

In 34238:

Fix crashes on jpeg2000_8 and jpeg2000_11 tests on un-patched Jasper 1.900.1 (closes #6513)

[Even Rouault]

In 34239:

Fix crashes on jpeg2000_8 and jpeg2000_11 tests on un-patched Jasper 1.900.1 (closes #6513)