Fixed couple tests to run with neo4j 3.4
Fixed couple tests to run with neo4j 3.4

Two tests failed when executed against snapshot version of neo4j 3.4.
The did not expect returned Cypher runtime name to be "SLOTTED", which
is the new default starting from 3.4.

This commit fixes tests to only verify that some defined string is
returned as runtime name.

neo4j/neo4j-javascript-driver,neo4j/neo4j-javascript-driver,neo4j/neo4j-javascript-driver,neo4j/neo4j-javascript-driver,neo4j/neo4j-javascript-driver