Tenant ID does not appear on all log lines for tenant

[jeffreyscarpenter]

PR #810 added the tenant ID to log lines using mdc, however this does not seem to work for all log lines. There are several messages that do not have a tenant ID even though the activity is associated with a user invocation.

For example: slow query log messages from the Java driver such as this (just showing the basic log message here, not the entire JSON entry):

[s670|88881972][Node(endPoint=/127.0.0.1:9042, hostId=f528764d-624d-3129-b32c-21fbca0cb8d6, hashCode=18883fd9)] Slow (1.190 s) [0 values] CREATE TABLE IF NOT EXISTS "default_keyspace"."documents_c79af125" (    key                 tuple<tinyint,text>,    tx_id               timeuuid,     doc_json            text,    exist_keys          set<text>,    array_size          map<text, int>,    array_contains      set<text>,    query_bool_values   map<text, tinyint>,    query_dbl_values    map<text, decimal>,    query_text_values   map<text, text>,     query_timestamp_values map<text, timestamp>,     query_null_values   set<text>,        ...<truncated>

or other driver errors

[s675] Authentication error (AuthenticationException: Authentication error on node /127.0.0.1:9042: server replied with 'Provided username token and/or password are incorrect' to AuthResponse request)