created shared file for some test fucntions

tests/shared.py

@@ -0,0 +1,19 @@
+"""
+This file contains shared functions used within multiple tests.
+
+Author(s): David Marchant
+"""
+from core.functionality import make_dir, rmtree
+from core.correctness.vars import TEST_HANDLER_BASE, TEST_JOB_OUTPUT, \
+    TEST_MONITOR_BASE
+
+def setup():
+    make_dir(TEST_MONITOR_BASE, ensure_clean=True)
+    make_dir(TEST_HANDLER_BASE, ensure_clean=True)
+    make_dir(TEST_JOB_OUTPUT, ensure_clean=True)
+
+def teardown():
+    rmtree(TEST_MONITOR_BASE)
+    rmtree(TEST_HANDLER_BASE)
+    rmtree(TEST_JOB_OUTPUT)
+    rmtree("first")