Python: Fix test failures.

Author: tausbn

python/ql/test/library-tests/PointsTo/new/SSA.expected

@@ -1,4 +1,4 @@
-WARNING: Predicate ssa_variable_points_to has been deprecated and may be removed in future (SSA.ql:10,5-37)
+WARNING: Predicate ssa_variable_points_to has been deprecated and may be removed in future (SSA.ql:10,3-35)
 | __init__.py:0 | __name___0 = ScopeEntryDefinition | 'code' | builtin-class str |
 | __init__.py:0 | __name___0 = ScopeEntryDefinition | 'code.package' | builtin-class str |
 | __init__.py:0 | __name___0 = ScopeEntryDefinition | 'code.test_package' | builtin-class str |

python/ql/test/library-tests/taint/extensions/TestStep.expected

@@ -1,5 +1,5 @@
 WARNING: Predicate getNode has been deprecated and may be removed in future (TestStep.ql:6,77-84)
-WARNING: Predicate getNode has been deprecated and may be removed in future (TestStep.ql:8,17-24)
+WARNING: Predicate getNode has been deprecated and may be removed in future (TestStep.ql:8,15-22)
 | Taint simple.test | visitor.py:10 | arg | p2 = simple.test |  -->  | Taint simple.test | visitor.py:13 | arg | p2 = simple.test |
 | Taint simple.test | visitor.py:18 | arg |  |  -->  | Taint simple.test | visitor.py:19 | arg |  |
 | Taint simple.test | visitor.py:19 | arg |  |  -->  | Taint simple.test | visitor.py:26 | Attribute() |  |

python/ql/test/library-tests/taint/general/Contexts.expected

@@ -1,5 +1,5 @@
 WARNING: Type CallContext has been deprecated and may be removed in future (Contexts.ql:5,6-17)
-WARNING: Type CallContext has been deprecated and may be removed in future (Contexts.ql:7,12-23)
+WARNING: Type CallContext has been deprecated and may be removed in future (Contexts.ql:7,10-21)
 | assignment.py:1 | p0 = simple.test | Function test |
 | assignment.py:1 | p1 = simple.test | Function test |
 | assignment.py:1 | p2 = simple.test | Function test |