[minor] fix validfrom timestamp creation in action generator
[minor] fix validfrom timestamp creation in action generator

vladimirdiaconescu/mig,mvanotti/mig,gdestuynder/mig,datachand/mig,pap/mig,pap/mig,mvanotti/mig,djmitche/mig,jvehent/mig,sunnygkp10/mig,zerosign/mig,rezen/mig,pap/mig,mvanotti/mig,rezen/mig,sunnygkp10/mig,vladimirdiaconescu/mig,deathping1994/mig,rayyang2000/mig,deathping1994/mig,zerosign/mig,gdestuynder/mig,mozilla/mig,gdestuynder/mig,yvesago/mig,therealkbhat/mig,deathping1994/mig,ameihm0912/mig,sunnygkp10/mig,pap/mig,datachand/mig,mozilla/mig,zerosign/mig,sunnygkp10/mig,datachand/mig,vladimirdiaconescu/mig,mozilla/mig,ameihm0912/mig,mozilla/mig,rezen/mig,jboyer2012/mig,therealkbhat/mig,jvehent/mig,gdestuynder/mig,yvesago/mig,rayyang2000/mig,ameihm0912/mig,yvesago/mig,yvesago/mig,vladimirdiaconescu/mig,jboyer2012/mig,zerosign/mig,djmitche/mig,jvehent/mig,rayyang2000/mig,jboyer2012/mig,rezen/mig,jboyer2012/mig,therealkbhat/mig,mvanotti/mig,rayyang2000/mig,deathping1994/mig,mozilla/mig,therealkbhat/mig,datachand/mig,jvehent/mig