Added support for case when user lua path not specified
Added support for case when user lua path not specified

trupty/aerospike-client-python,aerospike/aerospike-client-python,arthurprs/aerospike-client-python,aerospike/aerospike-client-python,trupty/aerospike-client-python,aerospike/aerospike-client-python,arthurprs/aerospike-client-python,arthurprs/aerospike-client-python,trupty/aerospike-client-python