The point Hillary made was there was a consensus among the 17 agencies. A join statement was made representing these agencies: https://www.dhs.gov/news/2016/10/07/joint-statement-departme...
Moreover, note that James Clapper, the head of the OCI also lied to Congress about NSA in a very blatant manner: http://www.hasjamesclapperbeenindictedyet.com/
Also note from your source: "However, we are not now in a position to attribute this activity to the Russian Government."