fix(authentication): delete cookie (in chrome) on logout (DEV-325) (#1970)

Author: subotic

webapi/src/main/scala/org/knora/webapi/routing/Authenticator.scala

@@ -327,7 +327,8 @@ trait Authenticator extends InstrumentationSupport {
                 domain = cookieDomain,
                 path = Some("/"),
                 httpOnly = true,
-                expires = Some(DateTime(1970, 1, 1, 0, 0, 0))
+                expires = Some(DateTime(1970, 1, 1, 0, 0, 0)),
+                maxAge = Some(0)
               )
             )
           ),

webapi/src/test/scala/org/knora/webapi/e2e/v1/AuthenticationV1E2ESpec.scala

@@ -162,7 +162,8 @@ class AuthenticationV1E2ESpec
               domain = Some(settings.cookieDomain),
               path = Some("/"),
               httpOnly = true,
-              expires = Some(DateTime(1970, 1, 1, 0, 0, 0))
+              expires = Some(DateTime(1970, 1, 1, 0, 0, 0)),
+              maxAge = Some(0)
             )
           )
         )