In his final Presidential press conference, Barack Obama said that the DNC emails were leaked, not hacked:

Three U.S. Intelligence Agencies (CIA, NSA and FBI) claim that IT-Systems of the Democratic National Committee were “hacked” in an operation related to the Russian government. They assert that emails copied during the “hack” were transferred by Russian government related hackers to Wikileaks which then published them.

President Obama disagrees. He says those emails were “leaked”.

Wikileaks had insisted that the emails it published came from an insider source not from any government. The DNC emails proved that the supposedly neutral Democratic Party committee had manipulated the primary presidential elections in favor of the later candidate Hillary Clinton. This made it impossible for the alternative candidate Bernie Sanders to win the nomination. Hillory Clinton, who had extremely high unfavorable ratings, lost the final elections.
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Here is President Obama in his final press conference yesterday (vid @8:31):

First of all, I haven’t commented on WikiLeaks, generally. The conclusions of the intelligence community with respect to the Russian hacking were not conclusive as to whether Wikileaks was witting or not in being the conduit through which we heard about the DNC emails that were leaked.

The DNC emails “that were leaked” – not “hacked” or “stolen” but “leaked”.

One wonders if this is a parting shot is primarily aimed at the involved Intelligence Agencies led by James Clapper and John Brennan. Or is dissing Hillary Clinton and her narrative the main purpose?

Dissing Hillary is the main purpose.

If Obama weren’t thoroughly in the pocket of Clapper and Brennan, he would have fired them when they lied to and spied on members of Congress.

More importantly, it indicates that the DNC email leaks were an inside job, not the work of the GRU (read the reports, the FSB may have gotten into the DNC, but they did not redistribute the results, basic spycraft).