feat(jnml): update util to also use pyneuroml

Author: sanjayankur31

omv/engines/jneuroml.py

@@ -17,6 +17,8 @@ def get_environment():
             jnmlhome = os.environ["JNML_HOME"]
         elif shutil.which(JNeuroMLEngine.e_name) is not None:
             jnmlhome = Path(shutil.which(JNeuroMLEngine.e_name)).parent
+        else:
+            jnmlhome = ""
 
         environment_vars = {"JNML_HOME": jnmlhome}
 

omv/omv_util.py

@@ -228,9 +228,7 @@ def _install_engine(eng):
             if ee.is_installed():
                 already_installed = True
             else:
-                from omv.engines.getjnml import install_jnml
-
-                install_jnml(engine_version)
+                ee.install(None)
 
         elif eng.lower() == "neuroConstruct" or eng == "Py_neuroConstruct".lower():
             from omv.engines.pyneuroconstruct import PyneuroConstructEngine as ee