Fixes to HLT run2 menu for 72X

It includes overal the two previous PR's

#5296 (JIRA ticket CMSHLT-109): 

- Allow HLT_PFJet260 back in the GRun table (PS=0), for validation purposes

#5411 (JIRA ticket CMSHLT-110:

- Migration of e+tau path to common electron WP

- Fix wrong settings in hltEle27WP85GsfMissingHitsFilter module

I will close those PR so that mergeability issues can be avoided. HLT menu fixes and adjustments towards the implementation of the new L1 menu will pend from this PR in 72X