(PDB-697) Added docs/tests for new queryable nodes fields and operators

New fields are now available as part of the nodes endpoint that resulted
from moving the endpoint into the query engine. This commit tests and
documents those new fields
Merge pull request #987 from senior/ticket/master/pdb-697-doc-test-nodes-qe-change

(PDB-697) Added docs/tests for new queryable nodes fields and operators
(PDB-660) final refactor

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-660) limited-query-resources removed from resources.clj

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-660) Migrate version decision to query->sql for resources

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-660) Convert facts query->sql to call qe itself

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-660) Event-counts cleanups

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-660) nodes switched over, still lots of failing tests

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-660) Nodes now passing

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-660) Convert events query->sql to use query-eng, with failing tests

Signed-off-by: Ken Barber <ken@bob.sh>
(PDB-660) 2 test failures left

Signed-off-by: Ken Barber <ken@bob.sh>