Change multiple get_java_xxx() functions in thread.cpp into one function

The various get_java_xxx() functions all seem to do the same thing. I am wondering if they can be combined into a single utility function, so that you can do something like:

JDK_Version::set_runtime_name(get_version_info(ik, vmSymbols::java_version_name(),
                              java_version, sizeof(java_version)));

Suggested by [~iklam]