Python: Add copy of extractor tests

These get to live next to the existing library and query tests, and are
run as part of both the Python 2 and Python 3 language tests.

python/ql/test/extractor-tests/paths/modules.expected

@@ -0,0 +1,6 @@
+| Module module | module | module.py |
+| Module package.__init__ | package.__init__ | package/__init__.py |
+| Module package.x | package.x | package/x.py |
+| Module package.y | package.y | package/y.py |
+| Module test | test | test.py |
+| Package package | package | package |

python/ql/test/extractor-tests/paths/modules.ql

@@ -0,0 +1,4 @@
+import python
+
+from Module m
+select m.toString(), m.getName(), m.getPath().toString()

python/ql/test/extractor-tests/paths/options

@@ -0,0 +1 @@
+semmle-extractor-options: -R . -p non-such --filter exclude:**/src_archive/**

python/ql/test/extractor-tests/paths/packages.expected

@@ -0,0 +1,3 @@
+| Module package.__init__ | Package package |
+| Module package.x | Package package |
+| Module package.y | Package package |

python/ql/test/extractor-tests/paths/packages.ql

@@ -0,0 +1,4 @@
+import python
+
+from Module m
+select m.toString(), m.getPackage().toString()