game_engine. Minor fixes to jni code.

Fixes to instrument calls in jni functions.
Comment fix to throw java exception.
base. Changes to exceptions - 1st phase.

Remvoe exception throwing utility methods.
Unify all native java exception to one native error exception.
Add exception handling to all JNI functions.
game_engine. Changes to error handling.

Replace all exception throwing with error and throw macros.