8158650: [jittester] when generating tests with default parameters, generation hangs after 98 test
Reviewed-by: kvn, iignatyev

8141149: [jittester] create Visitor for generating bytecode
8149463: [jittester] rarely generates tests with compile error
Reviewed-by: iignatyev, iveresov
Contributed-by: dmitrij.pochepko@oracle.com, igor.ignatyev@oracle.com, pavel.punegov@oracle.com, tatiana.pivovarova@oracle.com

8143966: JEP 233: Generate Run-Time Compiler Tests Automatically
Reviewed-by: iveresov, vlivanov
Contributed-by: anton.ivanov@oracle.com, dmitrij.pochepko@oracle.com, igor.ignatyev@oracle.com, igor.veresov@oracle.com, konstantin.shefov@oracle.com, leonid.mesnik@oracle.com, pavel.punegov@oracle.com, tatiana.pivovarova@oracle.com