5.6 packages need to obsolete 5.5 packages

[philip-galera]

[11:00:18] joergbruehe:  There is no "mysql-wsrep-shared" RPM, it is separate "mysql-wsrep-shared-5.5" and "mysql-wsrep-shared-5.6". Going from 5.5 to 5.6 is no upgrade, it is a change of packages, so the 5.6 ones must explicitly "obsolete" the 5.5 ones.
[11:01:05] joergbruehe: This affects all sub-RPMs: meta, client, server, shared, test, ...

[fromdualjb]

Solved on github in my branch gh322-5.6:
All packages now have an explicit "obsoletes" for their 5.5 counterpart.