Localize notification_utils to the admin

This changeset pulls in all of the notification_utils code directly into the admin and removes it as an external dependency. We are doing this to cut down on operational maintenance of the project and will begin removing parts of it no longer needed for the admin.

Signed-off-by: Carlo Costino <carlo.costino@gsa.gov>

tests/notifications_utils/test_safe_string.py

@@ -0,0 +1,47 @@
+import pytest
+
+from notifications_utils.safe_string import (
+    make_string_safe_for_email_local_part,
+    make_string_safe_for_id,
+)
+
+
+@pytest.mark.parametrize(
+    "unsafe_string, expected_safe",
+    [
+        ("name with spaces", "name.with.spaces"),
+        ("singleword", "singleword"),
+        ("UPPER CASE", "upper.case"),
+        ("Service - with dash", "service.with.dash"),
+        ("lots      of spaces", "lots.of.spaces"),
+        ("name.with.dots", "name.with.dots"),
+        ("name-with-other-delimiters", "namewithotherdelimiters"),
+        (".leading", "leading"),
+        ("trailing.", "trailing"),
+        ("üńïçödë wördś", "unicode.words"),
+    ],
+)
+def test_email_safe_return_dot_separated_email_local_part(unsafe_string, expected_safe):
+    assert make_string_safe_for_email_local_part(unsafe_string) == expected_safe
+
+
+@pytest.mark.parametrize(
+    "unsafe_string, expected_safe",
+    [
+        ("name with spaces", "name-with-spaces"),
+        ("singleword", "singleword"),
+        ("UPPER CASE", "upper-case"),
+        ("Service - with dash", "service---with-dash"),
+        ("lots      of spaces", "lots-of-spaces"),
+        ("name.with.dots", "namewithdots"),
+        ("name-with-dashes", "name-with-dashes"),
+        ("N. London", "n-london"),
+        (".leading", "leading"),
+        ("-leading", "-leading"),
+        ("trailing.", "trailing"),
+        ("trailing-", "trailing-"),
+        ("üńïçödë wördś", "unicode-words"),
+    ],
+)
+def test_id_safe_return_dash_separated_string(unsafe_string, expected_safe):
+    assert make_string_safe_for_id(unsafe_string) == expected_safe