Eliminate "invalid member type qualification" warnings

These warnings are spurious in that the member types are correctly
qualified within the appropriate scope, but Eclipse reports them
to be consistent with javadoc[1], which has a long-standing bug.
Unfortunately, they also cannot be turned off.

For references to common Gerrit key/id types (e.g. Account.Id), just
use @code, as the @link isn't providing much value. For references
where the link might be more useful, use the fully-qualified type.

[1] https://bugs.eclipse.org/bugs/show_bug.cgi?id=371420

Change-Id: I0baca75c20e69c51d3bf251aa818460d30e3d631
4 files changed