Signatures as of release 9.0

[jtulach]

I've just generated snapshots of APIs as of release 9.0 as advocated at SignatureTest to be done after each release:

incubator-netbeans$ git checkout release90 -f
incubator-netbeans$ ant clean build
incubator-netbeans$ ant gen-sigtests-release
incubator-netbeans$ git status --short | cut -c 4- | xargs zip /tmp/sig.zip

and I am updating the latest master with the content of the ZIP:

incubator-netbeans$ git checkout -f master 
incubator-netbeans$ unzip /tmp/sig.zip 

With this change we shall never regress our APIs with respect to 9.0 release.

[jlahoda]

Looks reasonable, merging.