RFR (S) round 0 for 8135198 Add -XX:VMOptionsFile support to JAVA_TOOL_OPTIONS and _JAVA_OPTIONS

[Gerald Thornbrugh]

Hi Ron,

Your changes look good.

Jerry
> This change adds -XX:VMOptionsFile support to the JAVA_TOOL_OPTIONS
> and _JAVA_OPTIONS environment variables. With this change, the
> -XX:VMOptionsFile option is supported in the following option
> containers:
>
> - the command line
> - JAVA_TOOL_OPTIONS env var
> - _JAVA_OPTIONS env var
>
> Webrev:
>     http://cr.openjdk.java.net/~rdurbin/8135198_OCR0_JDK9_webrev
>
> Bug report:
>     https://bugs.openjdk.java.net/browse/JDK-8135198
>
> This bug fix has been tested on:
>       OS:
>         Solaris, MAC, Windows, Linux
>       Tests:
>         Manual unit tests
>         JPRT with -testset hotspot(including the SQE current test coverage for this feature.)
>