Merge branch 'Convert_strings' into 'master'

Automatically convert java strings to python strings (as in JCC version)

See merge request Petrush/orekit_jpype!4

orekit_jpype/orekit_jpype.py

@@ -14,7 +14,7 @@ def initVM():
     # Launch the JVM
     if not jpype.isJVMStarted():
         # '-Xcheck:jni','-verbose:jni','-verbose:class'
-        jpype.startJVM( convertStrings=False)
+        jpype.startJVM( convertStrings=True)
     else:
         print("JVM already started, resuming on started JVM")