Mother residences added to validator (2)

src/test/java/scot/carricksoftware/grants/validators/certificates/birthcertificate/BirthCertificateCommandPartThreeValidatorTest.java

@@ -83,7 +83,7 @@ class BirthCertificateCommandPartThreeValidatorTest {
                 birthCertificateCommandMock.getUntrackedFatherUsualResidence(),
                 "fatherUsualResidence",
                 "untrackedFatherUsualResidence",
-                "Only one usual residence and untracked usual residence may be specified.",
+                "Only one usual residence and untracked usual residence must be specified.",
                 bindingResultMock);
         verify(validateDateTypesMock).validatePastDate(birthCertificateCommandMock.getWhenRegistered(),
                 "whenRegistered",