DRIVERS-2938: Remove MONGODB-CR from spec tests (#1611)

Author: sanych-sun

source/auth/tests/legacy/connection-string.json

@@ -116,36 +116,6 @@ tests:
 - description: should throw an exception if no username (GSSAPI)
   uri: mongodb://localhost/?authMechanism=GSSAPI
   valid: false
-- description: should recognize the mechanism (MONGODB-CR)
-  uri: mongodb://user:password@localhost/?authMechanism=MONGODB-CR
-  valid: true
-  credential:
-    username: user
-    password: password
-    source: admin
-    mechanism: MONGODB-CR
-    mechanism_properties:
-- description: should use the database when no authSource is specified (MONGODB-CR)
-  uri: mongodb://user:password@localhost/foo?authMechanism=MONGODB-CR
-  valid: true
-  credential:
-    username: user
-    password: password
-    source: foo
-    mechanism: MONGODB-CR
-    mechanism_properties:
-- description: should use the authSource when specified (MONGODB-CR)
-  uri: mongodb://user:password@localhost/foo?authMechanism=MONGODB-CR&authSource=bar
-  valid: true
-  credential:
-    username: user
-    password: password
-    source: bar
-    mechanism: MONGODB-CR
-    mechanism_properties:
-- description: should throw an exception if no username is supplied (MONGODB-CR)
-  uri: mongodb://localhost/?authMechanism=MONGODB-CR
-  valid: false
 - description: should recognize the mechanism (MONGODB-X509)
   uri: mongodb://CN%3DmyName%2COU%3DmyOrgUnit%2CO%3DmyOrg%2CL%3DmyLocality%2CST%3DmyState%2CC%3DmyCountry@localhost/?authMechanism=MONGODB-X509
   valid: true

source/auth/tests/legacy/connection-string.yml

@@ -173,24 +173,8 @@ tests:
             db: "my=db"
         options: ~
     -
-        description: "Escaped user info and database (MONGODB-CR)"
-        uri: "mongodb://%24am:f%3Azzb%40z%2Fz%[email protected]/admin%3F?authMechanism=MONGODB-CR"
-        valid: true
-        warning: false
-        hosts:
-            -
-                type: "ipv4"
-                host: "127.0.0.1"
-                port: ~
-        auth:
-            username: "$am"
-            password: "f:zzb@z/z="
-            db: "admin?"
-        options:
-            authmechanism: "MONGODB-CR"
-    -
-        description: "Subdelimiters in user/pass don't need escaping (MONGODB-CR)"
-        uri: "mongodb://!$&'()*+,;=:!$&'()*+,;[email protected]/admin?authMechanism=MONGODB-CR"
+        description: "Subdelimiters in user/pass don't need escaping (PLAIN)"
+        uri: "mongodb://!$&'()*+,;=:!$&'()*+,;[email protected]/admin?authMechanism=PLAIN"
         valid: true
         warning: false
         hosts:
@@ -203,7 +187,7 @@ tests:
             password: "!$&'()*+,;="
             db: "admin"
         options:
-            authmechanism: "MONGODB-CR"
+            authmechanism: "PLAIN"
     -
         description: "Escaped username (MONGODB-X509)"
         uri: "mongodb://CN%3DmyName%2COU%3DmyOrgUnit%2CO%3DmyOrg%2CL%3DmyLocality%2CST%3DmyState%2CC%3DmyCountry@localhost/?authMechanism=MONGODB-X509"

source/connection-string/tests/valid-auth.json

@@ -1,7 +1,7 @@
 tests:
     -
         description: "Option names are normalized to lowercase"
-        uri: "mongodb://alice:[email protected]/admin?AUTHMechanism=MONGODB-CR"
+        uri: "mongodb://alice:[email protected]/admin?AUTHMechanism=PLAIN"
         valid: true
         warning: false
         hosts:
@@ -14,7 +14,7 @@ tests:
             password: "secret"
             db: "admin"
         options:
-            authmechanism: "MONGODB-CR"
+            authmechanism: "PLAIN"
     -
         description: "Missing delimiting slash between hosts and options"
         uri: "mongodb://example.com?tls=true"