[jittester] when generating tests with default parameters, generation hangs after 98 test

When running "make install" with seed=SEED2 and other default parameters, the generation hangs after test #98 is genrated

Most probably generation of test #99 does not hang, but just takes several hours (3 hours were not enough to finish it).

LOG:

home/jenkins/oracle_jdk_8u91/linux-amd64/bin/jar cfm dist/JITtester.jar manifest.mf -C build/classes .
/home/jenkins/oracle_jdk_8u91/linux-amd64/bin/java -ea -jar dist/JITtester.jar --property-file conf/default.properties --testbase-dir ws/hotspot/test
    start time | count | generat | running |
           --- | --- | --- | --- |
[13:56:14.421] | 0 | 15809 | 4438 |
[13:56:34.625] | 1 | 16040 | 3867 |
[13:56:54.532] | 2 | 11960 | 4099 |
[13:57:10.591] | 3 | 2715 | 3607 |
......................
[15:01:21.276] | 94 | 7961 | 3791 |
[15:01:33.029] | 95 | 13597 | 3959 |
[15:01:50.585] | 96 | 7694 | 3622 |
[15:02:01.901] | 97 | 4820 | 3619 |
[15:02:10.340] | 98 | 8931 | 3994 |

(Here it hangs)

There is no files with the name "Test_99.java" in either "java_tests" folder of "bytecode_tests" folder.