Step Tables: Different values in step tables should be detected by data-tables

[janschaefer]

Given a scenario
with a step with a parameter that has an @table annotation
When the scenario is executed multiple times
with different values for the table parameter
Then the resulting tables should be compared
and different values be replaced with a place holder variable.

  Given some table

     | parameter |
     +-----------+
     | <a>       |

  Cases:

    | # | a    |
    | 1 | foo  |
    | 2 | bar  |