Always generate a seed, refresh 1P cookies if necessary

[OlivierChirouze]

Today when a call is made to createSeed(), it reads current cookies via getIdsAndPreferences():

• if there are no local cookies, no call to the operator is made and the seed will be undefined
• if the cookies have not been refreshed (no paf_last_refresh cookie), same thing

Improvement: the call to createSeed() should trigger a refresh of cookies to make sure a call to the operator is triggered if needed.

Question: how to ensure this is not done in parallel to an explicit call to refreshIdsAndPreferences() (there should not be two calls in parallel!)

[OlivierChirouze]

We think we found a solution:

• remove refreshIdsAndPreferences() call from the onload of paf-lib script
• add the call to pbjs.que

The only thing is, to have PAF available we would need to do this after paf-lib script is loaded.
To avoid this dependency, we will introduce a queue for PAF, similar to the ones from prebid and google tags.