ToscaYamlToJsonConvertor class must be reworked/refactored.

This class contains multiple methods that are not easily maintainable

See sonar result for various methods of this class:
Refactor this method to reduce its Cognitive Complexity from 73 to the 15 allowed.
Cognitive Complexity of methods should not be too high (squid:S3776)
Reported in critical
Cognitive Complexity is a measure of how hard the control flow of a method is to understand. Methods with high Cognitive Complexity will be difficult to maintain.