CP-8667: Update RPU hotfixes in XenCenter

- XS60E009 has been replaced by XS62E006 and that the latter applies to all 6.x releases;
- 5.x hotfixes have changed, even though the version numbers are unchanged.

Signed-off-by: Mihaela Stoica <mihaela.stoica@citrix.com>
CP-8678: XC Help includes WLB help topics. WLB retirement message has been removed.
CP-8678: Updated version of the WLB help file.
Merge pull request #90 from ushamandya/xs64bit

Xs64bit
Merge pull request #89 from MihaelaStoica/CP-8667

 CP-8667: Update RPU hotfixes in XenCenter
Update XenCenter.wxs

CP-8667: Update RPU hotfixes in XenCenter (fixing installer)
CP-8667: Update RPU hotfixes in XenCenter (fixing installer)
Merge pull request #93 from GaborApatiNagy/xs64bit-1

CP-8667: Update RPU hotfixes in XenCenter (fixing installer)
Update xenadmin-build.sh

CP-8667: Update RPU hotfixes in XenCenter (fixing build script)