Refactor registration_open? method
Refactor registration_open? method

The registration_period is already checked in registration_dates_given?
method. No need to check it twice

rishabhptr/osem,BelieveC/osem,namangupta01/osem,meonkeys/osem,namangupta01/osem,claudiug/osem,Shriyanshagro/osem,AndrewKvalheim/osem,SeaGL/osem,kormoc/osem,AndrewKvalheim/osem,1000miles/osem,hennevogel/osem,ChrisBr/osem,Shriyanshagro/osem,Shriyanshagro/osem,claudiug/osem,neilmillard/osem,openSUSE/osem,neilmillard/osem,openSUSE/osem,kormoc/osem,bear454/osem,bear454/osem,differentreality/osem,sonalkr132/osem,kormoc/osem,raluka/osem,SeaGL/osem,Shriyanshagro/osem,sonalkr132/osem,rishabhptr/osem,alcho/osem,ChrisBr/osem,BelieveC/osem,sonalkr132/osem,ChrisBr/osem,raluka/osem,BelieveC/osem,ChrisBr/osem,raluka/osem,bear454/osem,AndrewKvalheim/osem,differentreality/osem,hennevogel/osem,differentreality/osem,bear454/osem,rishabhptr/osem,namangupta01/osem,differentreality/osem,SeaGL/osem,neilmillard/osem,1000miles/osem,meonkeys/osem,hennevogel/osem,claudiug/osem,raluka/osem,namangupta01/osem,sonalkr132/osem,openSUSE/osem,hennevogel/osem,kormoc/osem,BelieveC/osem,alcho/osem,meonkeys/osem,1000miles/osem,rishabhptr/osem,alcho/osem