The user property is only available on Unix-like platforms (due to
the USER environment variable). This commit updates the test to
explicitly set a specific property and then check that it's accessible
via the env endpoint rather than using one that is OS-specific.
See gh-7868
See gh-7881
Update `ManagementWebSecurityAutoConfiguration` to match nested path
for insensitive actuators.
Prior to this commit, when Spring Security was on the classpath
nested paths were considered sensitive (even if the actuator
endpoint was not sensitive). i.e. when setting
`endpoints.env.sensitive=false` `/env` could be accessed without
authentication but `/env/user` could not.
Fixes gh-7868
Closes gh-7881
