Model RealTime 11.1 2021.46-iFix1

175001: Adopt Log4j version 2.15

Log4j version used in Model RealTime has been upgraded to 2.15, which is more secure and is not affected by CVE-2021-44228. See here for details:
https://nvd.nist.gov/vuln/detail/CVE-2021-44228