Fix for JDK-6521376 add explicit processing of MaxTenuringThreshold XX option. When bad value for MaxTenuringThreshold is passed(e.g. negative value for unsigned option "-XX:MaxTenuringThreshold=-1"), then function print warning and continue execution with default value(0).

This behavior differs from Java 8. Java 8 process this situation in common way for unsigned options, i.e. print waring and reports a error.

Example:
1) Java 8u40
java -XX:MaxTenuringThreshold=-1 -version
Improperly specified VM option 'MaxTenuringThreshold=-1'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

2) Java 9 b55
java -XX:MaxTenuringThreshold=-1 -version
Invalid MaxTenuringThreshold: -XX:MaxTenuringThreshold=-1
java version "1.9.0-ea"
Java(TM) SE Runtime Environment (build 1.9.0-ea-b55)
Java HotSpot(TM) 64-Bit Server VM (build 1.9.0-ea-b55, mixed mode)

As we see, Java 8u40 and Java 9 b55 reports about wrong option value, but Java 8u40 exit with error and Java 9 b55 successfully exit.

So, Java 9 behavior must be corrected to match the common behavior(exit JVM and print common error message)