Resolve "Remove nose.tools dependency"

Summary

This MR removes nose from the integration tests (related to #23 (closed)).

Focus

Test Environment

Regular integration tests

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• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
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tests/test_query_template.py

@@ -353,12 +353,12 @@ def test_query_with_subquery_referenced_by():
             unique=True).name,
         "TestRecord")
 
-    assert_true(
+    assert_equal(
         db.execute_query(
             "FIND TestPerson WHICH IS REFERENCED BY TestPigExperiment AS A TestConductor",
             unique=True).name,
         "TestJohnDoe")
-    assert_true(
+    assert_equal(
         db.execute_query(
             "FIND TestPerson WHICH IS REFERENCED BY TestPigExperiment",
             unique=True).name,