adds check for staging journalist pubkey in config.py
adds check for staging journalist pubkey in config.py

pwplus/securedrop,conorsch/securedrop,ageis/securedrop,conorsch/securedrop,chadmiller/securedrop,chadmiller/securedrop,chadmiller/securedrop,harlo/securedrop,kelcecil/securedrop,chadmiller/securedrop,heartsucker/securedrop,jeann2013/securedrop,jeann2013/securedrop,jrosco/securedrop,ehartsuyker/securedrop,jaseg/securedrop,ehartsuyker/securedrop,kelcecil/securedrop,jeann2013/securedrop,pwplus/securedrop,micahflee/securedrop,ehartsuyker/securedrop,pwplus/securedrop,micahflee/securedrop,jrosco/securedrop,jeann2013/securedrop,conorsch/securedrop,ehartsuyker/securedrop,pwplus/securedrop,heartsucker/securedrop,harlo/securedrop,garrettr/securedrop,harlo/securedrop,ageis/securedrop,kelcecil/securedrop,jaseg/securedrop,ehartsuyker/securedrop,pwplus/securedrop,jaseg/securedrop,garrettr/securedrop,jaseg/securedrop,conorsch/securedrop,jaseg/securedrop,harlo/securedrop,chadmiller/securedrop,micahflee/securedrop,harlo/securedrop,ehartsuyker/securedrop,ageis/securedrop,heartsucker/securedrop,garrettr/securedrop,garrettr/securedrop,jrosco/securedrop,jeann2013/securedrop,heartsucker/securedrop,harlo/securedrop,kelcecil/securedrop,conorsch/securedrop,pwplus/securedrop,kelcecil/securedrop,chadmiller/securedrop,ageis/securedrop,jrosco/securedrop,jrosco/securedrop,heartsucker/securedrop,jaseg/securedrop,micahflee/securedrop,jrosco/securedrop,kelcecil/securedrop,jeann2013/securedrop