changed "locations" to "_indices" and "count" to "_count" in CORE
changed "locations" to "_indices" and "count" to "_count" in CORE


Former-commit-id: 926945dad170f38f9a17a18e5fb09e876770757f
Former-commit-id: b41adc5897572d072fd53227a98348902b856cde
TomTranter/OpenPNM,amdouglas/OpenPNM,stadelmanma/OpenPNM,amdouglas/OpenPNM,PMEAL/OpenPNM