OPENAM-3756 - oauth2/tokeninfo?access_token returns an expires_in value larger than expected for an auth token

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@8472 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d
AME-3030 Prepare for OAuth2 and OpenID Connect Provider to become a common library - part 1

git-svn-id: https://svn.forgerock.org/openam/trunk/openam@8474 0f4defcf-c51a-4c67-9f44-6fb5eba73c5d