#694 Upgrade to Spring 5
#694 Upgrade to Spring 5

- Spring Security 4.2.18.RELEASE

elimu-ai/webapp,elimu-ai/webapp,literacyapp-org/literacyapp-web,elimu-ai/webapp,literacyapp-org/literacyapp-web,elimu-ai/webapp,literacyapp-org/literacyapp-web,literacyapp-org/literacyapp-web