Change name of SSO token parameter from sso-token to ssoToken
Change name of SSO token parameter from sso-token to ssoToken

This makes is consistent with the cookie-name that I am about to
implement. The spec for cookies says hyphens are OK in the name, but
not everyone's experience agrees: see
https://stackoverflow.com/a/27235182

Modifies STCOR-20; relates to STCOR-38.

folio-org/stripes-core,folio-org/stripes-core,folio-org/stripes-core