The setProperty() and withProperty() methods in MockEnvironment were
originally introduced with (String, String) signatures; however, they
should have always had (String, Object) signatures in order to comply
with the MockPropertySource and PropertySource APIs.
To address that, this commit changes the signatures of these methods so
that they only accept Object values for properties.
NOTE: this commit only affects the internal MockEnvironment used as a
test fixture. This commit does not affect the official, public
MockEnvironment implementation in spring-test.
See gh-34947
See gh-34948
d78264756e