Add Java process lookup for 'java.home' in find_jvm_dll_file()

[devinrsmith]

This adds an optional check when the java-utilities package is installed.

When java-utilities is not installed, it behaves as it does today:

Python 3.10.7 (main, Sep  7 2022, 00:00:00) [GCC 12.2.1 20220819 (Red Hat 12.2.1-1)] on linux                                                                                    
Type "help", "copyright", "credits" or "license" for more information.                                                                                                           
>>> import jpyutil                                                                                                                                                               
>>> jpyutil.init_jvm()                                                                                                                                                           
jpyutil - WARNING: Failed to preload JVM shared library. No shared library found.                                                                                                
Traceback (most recent call last):                                                                                                                                               
  File "<stdin>", line 1, in <module>                                                                                                                                            
  File "/home/devin/dev/jpy/jpyutil.py", line 455, in init_jvm                                                                                                                   
    import jpy                                                                                                                                                                   
ImportError: libjvm.so: cannot open shared object file: No such file or directory                                                                                                
>>>

When it is installed, it uses the java.home found from the java found on the path:

Python 3.10.7 (main, Sep  7 2022, 00:00:00) [GCC 12.2.1 20220819 (Red Hat 12.2.1-1)] on linux                                                                                    
Type "help", "copyright", "credits" or "license" for more information.                                                                                                           
>>> import jpyutil                                                                                                                                                               
>>> jpyutil.init_jvm()                                                                                                                                                           
(<CDLL '/usr/lib/jvm/java-17-openjdk-17.0.4.1.1-1.fc36.x86_64/lib/server/libjvm.so', handle 55a7d4beb1d0 at 0x7f14d714fbb0>, ['-Djpy.jpyLib=/tmp/jpy/lib64/python3.10/site-packag
es/jpy.cpython-310-x86_64-linux-gnu.so', '-Djpy.jdlLib=/tmp/jpy/lib64/python3.10/site-packages/jdl.cpython-310-x86_64-linux-gnu.so', '-Djpy.pythonLib=/usr/lib64/libpython3.10.so
', '-Djpy.pythonPrefix=/tmp/jpy', '-Djpy.pythonExecutable=/tmp/jpy/bin/python'])                                                                                                 
>>>

Fixes #82