Added boolean identity and one testcase for it

src/main/py/logical_operations.py

@@ -0,0 +1,2 @@
+def identity(a, b):
+    return a

src/test/py/test_logical_operations.py

@@ -0,0 +1,17 @@
+import unittest
+from src.main.py.logical_operations import *
+
+
+class calculationsWithRoots(unittest.TestCase):
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def test_identity_x_and_0_equals_x(self):
+        self.assertEqual(identity(1, 0), 1)
+
+
+if __name__ == "__main__":
+    unittest.main()