fixed aerospike.key() returning bad value.
fixed aerospike.key() returning bad value.

dohse/aerospike-client-nodejs,tonypujals/aerospike-client-nodejs,tonypujals/aerospike-client-nodejs,aerospike/aerospike-client-nodejs,jklepp-tgm/aerospike-client-nodejs,dohse/aerospike-client-nodejs,tonypujals/aerospike-client-nodejs,aerospike/aerospike-client-nodejs,dohse/aerospike-client-nodejs,aerospike/aerospike-client-nodejs,aerospike/aerospike-client-nodejs,dohse/aerospike-client-nodejs,jklepp-tgm/aerospike-client-nodejs,tonypujals/aerospike-client-nodejs,jklepp-tgm/aerospike-client-nodejs,tonypujals/aerospike-client-nodejs,aerospike/aerospike-client-nodejs,dohse/aerospike-client-nodejs,jklepp-tgm/aerospike-client-nodejs,jklepp-tgm/aerospike-client-nodejs