Corrected method names in getting_started_tutorial
Corrected method names in getting_started_tutorial

The convenience functions were failing because the method names had been updated in commit 38a8672ca4f93fa9aeda9fb11905bd23fbd069e2
which addressed ISSUE-117 (Add list datasets by processing level to podaac_utils) but changed the name of these methods.
nasa/podaacpy,Omkar20895/podaacpy,lewismc/podaacpy