feat(cicero-cli): add --data option to initilize, invoke and trigger commands

[martinhalford]

Signed-off-by: Martin Halford martin@benext.io

Closes #681

Changes

• Added --data flag and logic to trigger command.
• Added/fixed tests for --data flag
• Added --data flags to initialise and invoke commands, for consistency.
• Added/fixed tests for --data flag for initialise and invoke commands too.

Flags

• Should be backward compatible with previous use cases, as new --data flag is optional.
• Have removed mandatory requirement for --sample flag and sample.md.
• Now checks that either sample or data exists. At least one must be specified.
• If neither exists then throws exception.

Example Usage

cicero trigger --template ./hello-world --data ./hello-world/data.json 
cicero initialize  --template ./hello-world --data ./hello-world/data.json 
cicero invoke  --template ./hello-world --clauseName default --params ./hello-world/params.json --state ./hello-world/state.json --data ./hello-world/data.json

Note

Some significant changes to the validateInvokeArgs, validateTriggerArgs & validateInitializeArgs to handle the scenario where either the--sample option is provided --OR-- the --data option is provided.

[coveralls]

Coverage increased (+0.2%) to 97.035% when pulling 8624ce44957ea765b450481e263bf8275b51403d on martinhalford:add-data-option into 01f5393dd3075512d688844773f7a3b871062135 on accordproject:master.