module-python: crash on process exit when initialized from Java

[davidnich]

ex:

java: /home/david/src/qore/git/qore/include/qore/QoreThreadLock.h:83: void QoreThreadLock::lock(): Assertion `!rc' failed.

Thread 1 "java" received signal SIGABRT, Aborted.
0x00007ffff7e25e7c in __pthread_kill_implementation () from /lib64/libc.so.6
(gdb) bt 
#0  0x00007ffff7e25e7c in __pthread_kill_implementation () from /lib64/libc.so.6
#1  0x00007ffff7dd5aa6 in raise () from /lib64/libc.so.6
#2  0x00007ffff7dbf7fc in abort () from /lib64/libc.so.6
#3  0x00007ffff7dbf71b in __assert_fail_base.cold () from /lib64/libc.so.6
#4  0x00007ffff7dce656 in __assert_fail () from /lib64/libc.so.6
#5  0x00007fff27ea7c4d in QoreThreadLock::lock (this=0x7fff27eff5a0 <QorePythonProgram::py_thr_lck>)
    at /home/david/src/qore/git/qore/include/qore/QoreThreadLock.h:83
#6  0x00007fff27ea7cc6 in AutoLocker::AutoLocker (this=0x7fffffffcb40, l=...) at /home/david/src/qore/git/qore/include/qore/QoreThreadLock.h:145
#7  0x00007fff27e99571 in QorePythonProgram::pythonThreadCleanup () at /home/david/src/qore/git/module-python/src/QorePythonProgram.cpp:467
#8  0x00007fff809be2d6 in q_deregister_foreign_thread() () from /usr/lib64/libqore.so.12.1.1
#9  0x00007fff809bea35 in QoreForeignThreadHelper::~QoreForeignThreadHelper() () from /usr/lib64/libqore.so.12.1.1
#10 0x00007fff80a226ac in QoreProgramHelper::~QoreProgramHelper() () from /usr/lib64/libqore.so.12.1.1
#11 0x00007fff5e072cc1 in std::unique_ptr<QoreProgramHelper, std::default_delete<QoreProgramHelper> >::~unique_ptr() ()
   from /usr/lib64/qore-modules/jni-api-1.3.qmod
#12 0x00007ffff7dd80e5 in __run_exit_handlers () from /lib64/libc.so.6
#13 0x00007ffff7dd8260 in exit () from /lib64/libc.so.6
#14 0x00007ffff7dc0517 in __libc_start_call_main () from /lib64/libc.so.6
#15 0x00007ffff7dc05c9 in __libc_start_main_impl () from /lib64/libc.so.6
#16 0x0000555555555365 in _start ()