Update migration script to handle bug due to deleting sources with changed codenames
Update migration script to handle bug due to deleting sources with changed codenames

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