ContextLoaderListener not initialized during controller tests

[nya-elimu]

"10th" is accepted as word but I can't add this test because occuring error durign load EnvironmentContextLoaderListener

WordCreateController.java

String contentUrl = "https://" + EnvironmentContextLoaderListener.PROPERTIES.getProperty("content.language").toLowerCase() + ".elimu.ai/content/word/edit/" + word.getId();
EnvironmentContextLoaderListener.PROPERTIES return null during test.

Originally posted by @tomaszsmy in #1583 (comment)