Fediz OIDC grant handlers including client credentials

gistfile1.txt

<bean id="refreshTokenHandler" 
    class="org.apache.cxf.rs.security.oauth2.grants.refresh.RefreshTokenGrantHandler">
    <property name="dataProvider" ref="oauthProvider"/>
</bean>
    
<bean id="clientCredsHandler" 
    class="org.apache.cxf.rs.security.oauth2.grants.clientcred.ClientCredentialsGrantHandler">
    <property name="dataProvider" ref="oauthProvider"/>
</bean>
        
<util:list id="grantHandlers">
    <ref bean="refreshTokenHandler"/>
    <ref bean="clientCredsHandler"/>
</util:list>
    
<bean id="accessTokenService" class="org.apache.cxf.rs.security.oauth2.services.AccessTokenService">
    <property name="dataProvider" ref="oauthProvider"/>
    <property name="responseFilter" ref="idTokenFilter"/>
    <property name="grantHandlers" ref="grantHandlers"/>
    <property name="canSupportPublicClients" value="true"/>
</bean>