Issue #14123: Exclude google-collections from doxia-module-xdoc

[lukasgraef]

Fixes Issues #14123 and #14211 by also excluding google-collections from doxia-module-xdoc.

A previous fix (#14140) removed google-collections from doxia-core, but doxia-module-xdoc also contains google-collections as a transitive dependency.

[romani]

ok to merge if CI pass (Cirrus failure is expected and unfortunate)

@lukasgraef , did you check that it help in your gradle build ?

if yes, I can release fix today, to ease problem for all others. We still not able to reproduce problems on some opensource project.

[romani]

I am starting release 10.14.2

[romani]

released https://github.com/checkstyle/checkstyle/releases/tag/checkstyle-10.14.2

[romani]

I found how to reproduce this problem.
this update/PR and 10.14.2 fixed it, tested at #14211 (comment)

[XN137]

afaict this fix was required because doxia-module-xdoc also depends on doxia-core itself.

some things to consider:

a) we should probably prefer using <dependencyManagement> for doing these exclusions to affect all transitive usage of doxia-core (i basically had this in my original suggestion but was asked to change to a specific exclusion during review
this is of course assuming that gradle respects that tag the same way maven does.

b) the exclusion of commons-codec above is not respected when doxia-core is pulled in again by doxia-module-xdoc (might be another argument for using <dependencyManagement>)