Netpalm Versions Save

• refactors a bunch of internal code
• adds autoloader for dirver
• bump redis version
• introduce redis retry on error

• minor bugfix on user defined script models
• adds support for per task TTL

• implements caching support for scripts,
• allows models to be supported on same file as script
• refresh controller http routes when extensibles change

• adds python services
• removes jinja2 services
• adds new methods for the manger retrieve_task_result_multiple trigger_webhook

• adds support for interfacing directly with netpalm from within scripts via the new NetpalmManager class (see custom_scripts/hello_world_using_netpalm_manager.py) for an example script
• bugfix on script error handling
• general refactoring

• renews bundled self signed TLS cert for redis connections

• adds webbook debugging

adds alias for /get /getconfig endpoint.