#978 Email test utility always reporting "default SMTP port"

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@3312 a333f486-631f-4898-b8df-5754b55c2be0
mproved the processing of background task to enable more advanced functionalities like queuing (protection against reentrance)

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@3313 a333f486-631f-4898-b8df-5754b55c2be0