BUG-860: Fixed missing slash in generated YangModuleInfo implementations

Change-Id: I2d667fe8c7ddb9c18d521a314f9b00c133141b6a
Signed-off-by: Tony Tkacik <ttkacik@cisco.com>
(cherry picked from commit 8f42f38f1f21fe025350e0a2802b39723d0dd7c4)