new JBS filters for 11u and minor fixes to old filters

[Langer, Christoph]

Hi,

I've added new JBS filters for OpenJDK 11u Releases 11.0.7 and 11.0.8 and added links to them on the Wiki [0].

First of all, we currently have to defer and maybe eventually completely leave out some JVMCI related backports. You can follow the discussion and reasoning in another thread here on this list [1]. I've added filters that discard these items which should help focusing on the "real" ones.
11.0.7: https://bugs.openjdk.java.net/issues/?filter=38694
11.0.8: https://bugs.openjdk.java.net/issues/?filter=38695

Furthermore, for 11.0.8, I've created a filter that only shows net new Oracle 11.0.8 backports (leaving out items that date back to 11.0.7 or older and have not been backported in 11.0.8). I'm planning to maintain a filter for each upcoming update release as well.
11.0.8-only filter: https://bugs.openjdk.java.net/issues/?filter=38639

Furthermore, I've removed some now unnecessary parts of the queries that collect data of old releases that have been long out of the door and all backports have settled. That should hopefully improve the performance a bit and makes the query string shorter.

Best regards
Christoph

[0] https://wiki.openjdk.java.net/display/JDKUpdates/JDK11u
[1] https://mail.openjdk.java.net/pipermail/jdk-updates-dev/2020-March/002743.html