Registration should not assume there is an oldblob
Registration should not assume there is an oldblob

This change checks first if we have an old blobvault configured, and
only issues the remove command in that case.

Madsn/ripple-client,darkdarkdragon/ripple-client,darkdarkdragon/ripple-client,vhpoet/ripple-client,darkdarkdragon/ripple-client,ripple/ripple-client,darkdarkdragon/ripple-client,vhpoet/ripple-client,MatthewPhinney/ripple-client,Madsn/ripple-client,resilience-me/DEPRICATED_ripple-client,bsteinlo/ripple-client,mrajvanshy/ripple-client-desktop,arturomc/ripple-client,dncohen/ripple-client-desktop,yongsoo/ripple-client,Madsn/ripple-client,MatthewPhinney/ripple-client,h0vhannes/ripple-client,vhpoet/ripple-client,thics/ripple-client-desktop,mrajvanshy/ripple-client,MatthewPhinney/ripple-client,vhpoet/ripple-client-desktop,arturomc/ripple-client,wangbibo/ripple-client,xdv/ripple-client,mrajvanshy/ripple-client-desktop,vhpoet/ripple-client-desktop,xdv/ripple-client,xdv/ripple-client-desktop,dncohen/ripple-client-desktop,wangbibo/ripple-client,arturomc/ripple-client,xdv/ripple-client,h0vhannes/ripple-client,yongsoo/ripple-client,h0vhannes/ripple-client,arturomc/ripple-client,yongsoo/ripple-client-desktop,yxxyun/ripple-client-desktop,yxxyun/ripple-client-desktop,wangbibo/ripple-client,xdv/ripple-client,yongsoo/ripple-client-desktop,bsteinlo/ripple-client,ripple/ripple-client,wangbibo/ripple-client,thics/ripple-client-desktop,MatthewPhinney/ripple-client-desktop,MatthewPhinney/ripple-client-desktop,vhpoet/ripple-client,mrajvanshy/ripple-client,ripple/ripple-client,MatthewPhinney/ripple-client,darkdarkdragon/ripple-client-desktop,ripple/ripple-client,bankonme/ripple-client-desktop,Madsn/ripple-client,xdv/ripple-client-desktop,h0vhannes/ripple-client,bankonme/ripple-client-desktop,mrajvanshy/ripple-client,ripple/ripple-client-desktop,resilience-me/DEPRICATED_ripple-client,mrajvanshy/ripple-client,xdv/ripple-client-desktop,darkdarkdragon/ripple-client-desktop,yongsoo/ripple-client,yongsoo/ripple-client,ripple/ripple-client-desktop