add role based search to add seed nodes
add role based search to add seed nodes

mdbelt/dse-cookbook,tonan/dse-cookbook,tonan/dse-cookbook,mbrukman/dse-cookbook,TD-4242/dse-cookbook,dcparker88/dse-cookbook,mbrukman/dse-cookbook,mdbelt/dse-cookbook,TD-4242/dse-cookbook