[UIA-742] Update unit testing module to version 9.4.1

[MendixMurshed]

• We updated httpclient5 from 5.0.3 to 5.2.1
• We updated httpcore5 from 5.0.2 to 5.2
• We updated httpcore5-h2 from 5.0.2 to 5.2
• We updated slf4j-api from 1.7.25 to 1.7.36
• We removed the dependency on commons-codec-1.13

Note: Review the dependencies in the userlib folder after upgrading the Unit Testing module.