fix(jans-auth): Sample Custom script for SCIM event handling does not contain all methods

[maduvena]

Logs:

ec2-user@maduvena-feasible-dory:/opt/jans/jetty/jans-auth/logs> curl -k -G -H 'Authorization: Bearer 5d93a29f-fd40-44f2-984f-61d3be111255' --data-urlencode 'filter=displayName co "Admin"' https://your-jans-server/jans-scim/restv1/v2/Users
curl: (6) Could not resolve host: your-jans-server
ec2-user@maduvena-feasible-dory:/opt/jans/jetty/jans-auth/logs> curl -k -G -H 'Authorization: Bearer 5d93a29f-fd40-44f2-984f-61d3be111255' --data-urlencode 'filter=displayName co "Admin"' https://maduvena-feasible-dory.gluu.info/jans-scim/restv1/v2/Users
{"schemas":["urn:ietf:params:scim:api:messages:2.0:Error"],"status":"500","scimType":"","detail":"Unexpected error: NotImplementedError: 'ScimEventHandler' object does not implement abstract method 'manageSearchOperation' from 'io.jans.model.custom.script.type.scim.ScimType'"}ec2-user@maduvena-feasible-dory:/opt/jans/jetty/jans-auth/logs>