FAB-16353 Break endorser test 'It' into pieces

This CR breaks the endorser test's large primary "It" into several
instances, each testing a different aspect of the invocation.  It also
groups the context 'when blank fails" along with the corresponding it,
and adds some additional checks which were previously missing.

Change-Id: Ia8d592125b95109e9457d3dd51f873d16db93457
Signed-off-by: Jason Yellick <jyellick@us.ibm.com>

Author: Jason Yellick

core/endorser/endorser_suite_test.go

@@ -37,6 +37,11 @@ type txSimulator interface {
 	ledger.TxSimulator
 }
 
+//go:generate counterfeiter -o fake/history_query_executor.go --fake-name HistoryQueryExecutor . historyQueryExecutor
+type historyQueryExecutor interface {
+	ledger.HistoryQueryExecutor
+}
+
 func TestEndorser(t *testing.T) {
 	RegisterFailHandler(Fail)
 	RunSpecs(t, "Endorser Suite")