RFR: 8015068 : (m) Use jtreg -exclude for problemlist.txt processing

[Mike Duigou]

Hello all;

This changesest simplifies how the the jdk/test/Makefile processes excluded tests. Previously the test exclusions were pre-processed by scripts in the Makefile before being passed to JTReg. JTReg will now the all the processing. The change depends upon improvements in JTReg since the test exclude mechanism was originally defined.

There are some changes in the reporting. Most obvious is that the excludelist.txt output file is no longer produced. The 'excluded' count in the summary report may be removed in a future reporting depending on whether the value can be calculated some other way.

Additional to the exclusion list processing changes some other changes are possible as a result of the changes to exclusion processing. In particular the obsolete (and incorrect) logic for determining the build path included in the test/Makefile is now removed. If no output directory is provided via ALT_OUTPUTDIR then a default location in the current directory is used, "testoutput". At some point in the future this could be improved to get the CONF from the build configuration but that is not currently possible.

Testing of this patch requires using a source build of JTReg as it requires one fix that is not in the promoted builds. 

http://cr.openjdk.java.net/~mduigou/JDK-8015068/0/webrev/

Mike