message: Update wallet storage test scripts
diff: -# commands to create, open, etc a postgres wallet in CLI
  +# commands to create and open a postgres wallet in CLI
  # run cli as:
  -# RUST_BACKTRACE=1 LD_LIBRARY_PATH=../samples/storage/storage-postgres/target/debug/ cargo run ../samples/storage/storage-postgres/cli_ps_test.txt
  +# RUST_BACKTRACE=1 LD_LIBRARY_PATH=../samples/storage/storage-postgres/target/debug/ cargo run ../samples/storage/storage-postgres/cli_ps_create.txt
  # register the postgres plug-in
  -wallet register postgres so_file=libindystrgpostgres.dylib prefix=postgreswallet_fn_
  +load-plugin library=../samples/storage/storage-postgres/target/debug/libindystrgpostgres.dylib initializer=postgresstorage_init
  # create a postgres wallet
  -wallet create wallet_psy key storage_type=postgres storage_config={"url":"localhost:5432"} storage_credentials={"account":"postgres","password":"mysecretpassword","admin_account":"postgres","admin_password":"mysecretpassword"}
  +wallet create wallet_psy key storage_type=postgres_storage storage_config={"url":"localhost:5432"} storage_credentials={"account":"postgres","password":"mysecretpassword","admin_account":"postgres","admin_password":"mysecretpassword"}
  # open the postgres wallet
  wallet open wallet_psy key storage_credentials={"account":"postgres","password":"mysecretpassword","admin_account":"postgres","admin_password":"mysecretpassword"}
  # create and use a new DID in the wallet
  did new seed=00000000000000000000000000000My5 metadata=my_did_metadata
  did use VREsKVpdEtWCcCmMfddYuT
  -# don't delete wallet - just leave us in an open state
  -# wallet close
  -# wallet delete wallet_psy key storage_credentials={"account":"postgres","password":"mysecretpassword","admin_account":"postgres","admin_password":"mysecretpassword"}
  +# don't close or delete wallet - just leave us in an open state
  