Probably not. I snooped around Google, and it turns out the only mention of the word 'Kedavra' is from the three unforgivable curses in Harry Potter universe. Namely the one that causes death to the one it's cast on. And Doloris is derived from the Spanish dolores, which means sorrow or aches.
Basically where I'm going with is that they picked two words that normally are linked to suffering and loss of life, turned it around and called it a life gain mission.
Kedavra is the killing curse in Harry Potter and Dolores is someone in harry potter. A wizard maybe that uses super hero illusions :O
Is everyone forgetting the Harry Potter character Professor Dolores Umbridge, the right awful women who took over Hogwarts and forced Dumbledore's resignation?
Mainly because the mods crack down on any sort of speculation. I think the guy in charge of naming the missions simply picked it based on HP, as GeneralZod pointed out.
Oh come on, there's literally nothing supporting that. One, she's not a Skeelz. Two, she's not a life gainer. Three, what Duessel said. Four, cats don't strike as a high-likehood CR clan. Five, that sounds silly. Six, you were wrong the last time.