Modify progress bar behavior in cyclades wait
Refs: #4352
Progress bar is now able to "count down", be "eating" the bar instead offilling it, thus has meaning for timeoutsAll waits are time-outs, except for "server BUILD"
Take care of the documentation (except developers)
Fix IntArgument + tests and apply to snf-astakos
Add meta/properties image methods, whip compute
Refs: #4231
New methods:/image meta list/set/delete --<meta>[=value] ... -p k1[=v1] [-p k2[=v2]] ...
Add --property to image list
Refs: #4220
Also, fix various bugs introduced by utils re-writtings
Test ArgumentParseManager.parse
Test ArgumentParseManager.update_arguments
Refs: #4058
Missing test: ArgumentParseManager.parse
Fix intetation mistake
Allow non-None empty default values in Args
Test ArgumentParseManager upto update_parser
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