(Un)fortunately there is absolutely no credibility anymore behind any messages released by putins govt, they proved multiple times already that they are saying one thing and doing another.
And how exactly would Putin's pupet government work towards joining the EU? It's not like it's a job for normal citizens to work towards that. This requires a desire and a massive effort of a whole government, to achieve.
EDIT: EU was explicitly mentioned as irrelevant by putins press-secretary in a recent press conference (he was asked about it).