Updates for v2.6 and 2.7 with demo device model fixes. - #596

Updates for v2.6 and 2.7 with demo device model fixes.#596

wsobel merged 6 commits into

mainmtconnect/cppagent:mainfrom

fix_cxx20_deprecation_warningsmtconnect/cppagent:fix_cxx20_deprecation_warningsCopy head branch name to clipboard