Bug 1123 - Fixed incorrect augment target resolving

- Introduced new ParserUtils#findSchemaNodeInModule
  in parser utils
  which uses SchemaPath, Iterable and full QName match
  to lookup builders for augmentations

- Updated augmentation resolution to use findSchemaNodeInModule
  to lookup correct augmentation target using
  full QName match (namespace, revision, localName) instead
  original algorithm using localName only.

- Updated incorrect negative tests for augmentations
  Added conflicting augmentations.

Change-Id: I36b814a85759605ef43eb65485d9ec592871fb15
Signed-off-by: Tony Tkacik <ttkacik@cisco.com>