[Web Portal] Fix token authentication bug

[sunqinzheng]

#2779

• fix cookie's expiration date
• Portal will clear the token cache and redirect user to login page (logout) when it receives an unauthorized error

[coveralls]

Coverage decreased (-0.01%) to 53.302% when pulling 900e965 on qinsu/portal/auth-error into 34523ef on master.

[coveralls]

Coverage decreased (-0.01%) to 53.302% when pulling 900e965 on qinsu/portal/auth-error into 34523ef on master.

[coveralls]

Coverage decreased (-0.01%) to 53.302% when pulling 900e965 on qinsu/portal/auth-error into 34523ef on master.

[coveralls]

Coverage remained the same at 53.313% when pulling 461a67f on qinsu/portal/auth-error into 34523ef on master.