RFR(M) : Add CTW test for boot module

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8178291/webrev.00/index.html
> 237 lines changed: 236 ins; 0 del; 1 mod;

Hi all,

could you please review the patch which adds a test which runs CTW for lib/modules?

Besides a file w/ jtreg test description, the patch contains CtwRunner class, which is a driver class for CTW tests. it compiles all classes from a target and, in case of an error, saves information about the error and restart CTW starting from the next class. The test takes approx. 2 hours to complete.  

currently there are 20 known errors related to class initialization. corresponding bugs will be filed and fixed shortly.

webrev: http://cr.openjdk.java.net/~iignatyev//8178291/webrev.00/index.html
jbs: https://bugs.openjdk.java.net/browse/JDK-8178291
testing: test/applications/ctw/Modules.java 

Thanks,
-- Igor