BUG: ISession.update is broken wrt defaultPermissions and perhaps other

[jamoore]

Looks like the call to setDefaultPermissions in the session candidate is being ignored and then overriden by the original session value.

Be sure to see the SpecialObjectsPermTest commits from #1794

[jmoore]

In [22]: ss = s.getSessionService()

In [23]: sess = ss.getSession(s.ice_getIdentity().name)

In [24]: sess.defaultPermissions.val  
Out[24]: 'rw----'

In [25]: sess.defaultPermissions = omero.rtypes.rstring("rwrw--")

...

In [27]: sess = ss.updateSession(sess)

In [28]: sess.defaultPermissions.val
Out[28]: 'rw----'

[jmoore]

(In [6453]) see #1704 - removing updateSession

After a discussion with the team, the only remaining use
of updateSession was the setting of the active group from
4.1. This has now been replaced by setSecurityContext
and can be removed.

[jmoore]

(In [6454]) fix #1704 - removing default permissions

defaultPermissions and all umask support is also no longer
needed due to the restrictions of #1434 - all objects in a group
have the same permissions.

[jmoore]

See also #1731

[jmoore]

(In [6570]) see #1704 - removing umask argument from createUserSession

[jmoore]

(In [6586]) see #1704 - Removing defaultpermissions from data.vm

[jmoore]

(In [6829]) see #1704 - Also removing umask from System.ice