As part of work on split of ideX
(http://openide.netbeans.org/proposals/arch/clusters.html) it has been
observed that apisupport/project has implementation dependency on xml/tax.
This is undesirable even now, but much worse, if those two modules are split
to independent clusters.
Turn it into some regular contract or remove it.
Dependent on TAX to expose some API.
Note that apisupport/project will *probably* switch to XDM (XAM?) for promo H.
Fixed as part of issue 147096.
*** This issue has been marked as a duplicate of 147096 ***