SEVERE WARNING!!! in tests

[rotu]

The MultiClassLoaderTest.noWarningOnLazyLoad test case produces a scary looking warning.

Judging by the name of the case, (1) the warning should not happen (2) the test case is broken for failing to detect this warning.

7: [ RUN      ] MultiClassLoaderTest.noWarningOnLazyLoad
7: Warning: class_loader.ClassLoader: SEVERE WARNING!!! Attempting to unload library while objects created by this loader exist in the heap! You should delete your objects before attempting to unload the library or destroying the ClassLoader. The library will NOT be unloaded.
7:          at line 158 in /tmp/ws/src/ros/class_loader/src/class_loader.cpp
7: Warning: class_loader.ClassLoader: SEVERE WARNING!!! Attempting to unload library while objects created by this loader exist in the heap! You should delete your objects before attempting to unload the library or destroying the ClassLoader. The library will NOT be unloaded.
7:          at line 158 in /tmp/ws/src/ros/class_loader/src/class_loader.cpp
7: Meow
7: Bark
7: Beep boop
7: [       OK ] MultiClassLoaderTest.noWarningOnLazyLoad (0 ms)