session_jscore_passthrough.yml test suite should fail if command is sent without a session

The Mongo.prototype.runCommand() and Mongo.prototype.runCommandWithMetadata() functions should be overridden such that an error is thrown if they receive a command object without an "lsid" property. This approach would have caught the issue with getMore command requests described in SERVER-30848 and may find additional gaps in how sessions are integrated in the mongo shell.

Note: Until SERVER-30848 is fixed, we can condition throwing an error on the command being something other than a getMore.