set default jmx-host value in jetty-jmx.xml

defaulting jmx-host to 0.0.0.0 because nobody reads the doc.
NX-459: Backport KZ Timeline
NX-459: Undo list reverse

That does not work anyway, as paging is
off due to lack of descending sort direction
in the first place
NX-459: Using KZ with backported SortDirection
NX-459: Ported IT related changes

Changes not directly in plugin but "around" it
Merge pull request #550 from sonatype/nexus-2.9.x-NX-459-kz-timeline

[2.9] NX-459: Backport KZ Timeline
Merge branch 'nexus-2.9.x' into NX-453-message-advisory-content
NEXUS-6622: Backport from master

Original PR
https://github.com/sonatype/nexus-oss/pull/554
Merge pull request #558 from sonatype/nexus-2.9.x-NEXUS-6622-unknown-charset

[2.9] Backport of NEXUS-6622 Unknown charset
NEXUS-6537: Backport of master

Original PR
https://github.com/sonatype/nexus-oss/pull/553
Merge pull request #559 from sonatype/nexus-2.9.x-NEXUS-6537-fs-move

[2.9] NEXUS-6537 Backport
Merge branch 'nexus-2.9.x' into NX-453-message-advisory-content