Utility functions error and warning behavior

[Magnus167]

The utility functions should allow (where reasonable and possible) the following arguments:

• raise_error: bool: default True. If true, the function does not raise an error. instead falls back to an otherwise valid state, i.e. (eg1) in case of missing data a function may warn and continue. (eg2) in case of a calculation function the function may simply return NA
• suppress_warnings: default False. If true, the function will not raise any warnings