Fix typos for Tomcat context.xml

This issue was already fixed and merged in #205274 but raised again.

Context parameters are switched in the context.xml content for Tomcat. The environment settings passed as CATALINA_OPTS do not correspond to the ones used in the context.xml.

username was assigned to url
password assigned to username
url assigned to password

-------
cc: @JasonFreeberg

Author: felipmiguel

articles/app-service/configure-language-java.md

@@ -950,10 +950,10 @@ Next, determine if the data source should be available to one application or to
         <Resource
             name="jdbc/dbconnection"
             type="javax.sql.DataSource"
-            url="${dbuser}"
+            url="${connURL}"
             driverClassName="<insert your driver class name>"
-            username="${dbpassword}"
-            password="${connURL}"
+            username="${dbuser}"
+            password="${dbpassword}"
         />
     </Context>
     ```