[SHIRO-899] moved the HttpSessionContext Jakarta shim into Shiro pack…

[lprimak]

…age and out of jakarta package,

to made JPMS work, and avoid split package issues

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[lprimak]

@boris-petrov Can you please test the latest and see if it works for you now?
Thank you!

[boris-petrov]

@lprimak that seems to resolve the problem! Thank you for the quick fix!