Made the redis client dependencies optional
Made the redis client dependencies optional

jgrandja/spring-security-oauth,gharizanov92/spring-security-oauth,ollie314/spring-security-oauth,jmnarloch/spring-security-oauth,spring-projects/spring-security-oauth,gharizanov92/spring-security-oauth,michaelwoodson/spring-security-oauth,ollie314/spring-security-oauth,Fitzoh/spring-security-oauth,marcosbarbero/spring-security-oauth,Fitzoh/spring-security-oauth