Feature/edge url monitor ng assertions
TODO:
- use other types of queries from surykatka
- per configured entry generate one and only one result
- test against a lot of various scenarios found in surykatka reports, and improve even more
- depends on slapos.toolbox!111 (merged)
- depends on !1367 (merged) in order to have new slapos.toolbox landed on master
- (optional) improve promise names (go back to readable ones)