Submodule update for vss-tools (...)
Submodule update for vss-tools (...)

Shortlog of the changes inside vss-tools:
- aacda16 vspec2yaml.py tool added
- 9466348 Improving tools documentation
- 865ea7c CI: Remove deprecated travis config. GH actions is used for CI
- 9d69404 model/constants: simplify and optimize from_str() using a meta class
- 939cf9b VSSo: Removal schema:range includes
- 9385b1e Updated VSSo tools
- 1fcc8ff Changing instances variable initalization. resolves #77
- 3b0ad73 Using separator "/" at qualified_name()
- 94c7445 Changing undefined behavior of include_dirs
- 6ddca7d Renaming exclude_private to merge_private
- 14d0446 vspec2graphql: Removing uuid parameter support
- da98f10 vspec2graphql: Skip empty branches
- dc79c30 usage: Fix inconsistent variable names
- dbf171b vspec2graphql.py: (New GraphQL schema generator)

Signed-off-by: Gunnar Andersson <df6c1dc70ee3404c16d7de0a5a8d978b44fa18d4@genivi.org>

GENIVI/vehicle_signal_specification,GENIVI/vehicle_signal_specification