basic search/replace of Tester with iwt, including schema doc

docs/schema.md

@@ -11,7 +11,7 @@ zip: the user's home zip code
 age: the user's self reported age  
 is_latino: enum of responses, see IsLatinoLabels in home/models/account.py  
 is_sf_resident: true/false if the zip code is in the list of SF zip codes  
-is_tester: true if the user is a tested, automatically set if the name includes Tester  
+is_tester: true if the user is a tested, automatically set if the name includes IWT  
 gender: enum of responses, see GenderLabels in home/models/account.py  
 gender_other: freeform text response if gender is Other  
 race: enum of responses, see RaceLabels in home/models/account.py  

home/tests/integration/appuser/test_create.py

@@ -67,14 +67,14 @@ def test_create_tester_appuser_success(self):
         request_params = self.request_params.copy()
         request_params.update(
             {
-                "name": "Tester John",
+                "name": "IWT John",
                 "zip": "94105",
             }
         )
         expected_response = self.expected_response.copy()
         expected_response.update(
             {
-                "name": "Tester John",
+                "name": "IWT John",
                 "zip": "94105",
                 "is_tester": True,
                 "is_sf_resident": True,

home/tests/unit/api/test_appuser.py

@@ -6,14 +6,14 @@
 class TestIsTester(TestCase):
     def test_is_tester(self):
         examples = [
-            ("Tester A", True),
-            ("Test B", False),  # are we sure this is the behavior we want?
-            ("tester c", True),
-            ("Testerosa", False),
-            ("tester-d", True),
-            ("Tester_E", True),
-            ("testrata", False),
-            ("tester", False),  # are we sure this is the behavior we want?
+            ("Iwt A", True),
+            ("Test B", False),
+            ("iwt c", True),
+            ("Iwterosa", False),
+            ("iwt-d", True),
+            ("Iwt_E", True),
+            ("iwtrata", False),
+            ("iwt", True),
         ]
         for example, expected in examples:
             self.assertEqual(

home/views/api/appuser.py

@@ -20,7 +20,7 @@
 
 # Determines whether Account is tester account, based on name prefix
 def is_tester(name_field: str) -> bool:
-    possible_prefixes = ["tester-", "tester ", "tester_"]
+    possible_prefixes = ["iwt-", "iwt ", "iwt_"]
     return any(
         [name_field.lower().startswith(prefix) for prefix in possible_prefixes]
     )