Adding description related to composite databases (#1159) (#1172)

Cherry-picked from #1159

Author: lidiazuin

modules/ROOT/pages/database-administration/standard-databases/manage-databases.adoc

@@ -173,7 +173,7 @@ The lag is expressed in negative integers. In standalone environments, the value
 | INTEGER
 
 |constituents
-|The names of any constituents the database may have. label:default-output[]
+|The names of any constituents the database may have. Applicable only for composite databases. label:default-output[]
 | LIST<STRING>
 
 |options