jfx-dev issues in JBS should now use "openjfx11" as release version

[Kevin Rushforth]

Starting now, the JBS release version for the "jfx-dev" repo is "openjfx11".

All JBS issues for bugs that affect jfx-dev (e.g., are found in a local 
build or in an openjfx-11-ea release) should use "openjfx11" as the 
"affected version". Likewise, all bugs that are fixed in jfx-dev or 
targeted to be fixed in the 11 time frame should use "openjfx11" as the 
"fix version".

Existing bugs (open bugs as well as any bugs found or fixed after last 
week's jdk-11+13 build) have been updated to reflect this.

Let me know if you have any questions about this.

Thanks.

-- Kevin