BEF: unable to update java_library classpath in BUILD file to reload Bazel Classpath Container

[plaird]

This was working at one point, but I presume some caching work broke this.

1. Load a Bazel package with Java rules into BEF
2. Open the BUILD file in Eclipse, add a new dep to the java_library, and save
3. If Bazel classpath container doesn't update, do a Clean for the project
4. Look for any console output that confirms that classpath container was recomputed

Steps 2, 3 and 4 don't succeed.