Request for reviews (S): 8006204: please JTREGify test/compiler/7190310/Test7190310.java

[David Chase]

http://cr.openjdk.java.net/~drchase/8006204/webrev.00/

pre-fix: 
Test7190310.java was a manual test because of timing issues -- failure is an infinite loop, but success may require more time than the default timeout (though usually it doesn't).
A companion _unsafe test was already annotated correctly (no timeout needed) and already run automatically by jtreg.

fix:
Add proper jtreg annotations in the preceding comment, including an explicit timeout.

post-fix: 
Both tests (Test7190310.java  and Test7190310_unsafe.java) were observed to run in jtreg.

Testing:
local with jtreg and "jtreg -a" to verify that test is now automatic.
JPRT passed.
I tried to manually verify that JPRT ran both parts of this specific test, but could not figure out where (or if) this information was kept.