Add new DSE CQL keywords for 6.8

Author: aboudreault

CHANGELOG.rst

@@ -14,6 +14,7 @@ Features
 * Support NULL in collection deserializer (PYTHON-1123)
 * Avoid warnings about unspecified load balancing policy when connecting to a cloud cluster (PYTHON-1177)
 * Add Python 3.8 support (PYTHON-1189)
+* Add new DSE CQL keywords (PYTHON-1122)
 * [GRAPH] Ability to execute Fluent Graph queries asynchronously (PYTHON-1129)
 
 Bug Fixes

cassandra/metadata.py

@@ -57,7 +57,14 @@
     'permissions', 'primary', 'rename', 'replace', 'returns', 'revoke', 'role', 'roles', 'schema', 'select', 'set',
     'sfunc', 'smallint', 'static', 'storage', 'stype', 'superuser', 'table', 'text', 'time', 'timestamp', 'timeuuid',
     'tinyint', 'to', 'token', 'trigger', 'truncate', 'ttl', 'tuple', 'type', 'unlogged', 'update', 'use', 'user',
-    'users', 'using', 'uuid', 'values', 'varchar', 'varint', 'view', 'where', 'with', 'writetime'
+    'users', 'using', 'uuid', 'values', 'varchar', 'varint', 'view', 'where', 'with', 'writetime',
+
+    # DSE specifics
+    "node", "nodes", "plan", "active", "application", "applications", "java", "executor", "executors", "std_out", "std_err",
+    "renew", "delegation", "no", "redact", "token", "lowercasestring", "cluster", "authentication", "schemes", "scheme",
+    "internal", "ldap", "kerberos", "remote", "object", "method", "call", "calls", "search", "schema", "config", "rows",
+    "columns", "profiles", "commit", "reload", "unset", "rebuild", "field", "workpool", "any", "submission", "indices",
+    "restrict", "unrestrict"
 ))
 """
 Set of keywords in CQL.