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

[Ron Durbin]

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.)