Unable to use mcd in release mode with exrm

[akki91]

Crash dump was written to: erl_crash.dump
Kernel pid terminated (application_controller) ({application_start_failure,mcd,{{{badmatch,undefined},[{mcd_cluster_sup,buckets,0,[{file,"src/mcd_cluster_sup.erl"},{line,60}]},{mcd_cluster_sup,clust