fixes Bug 1068154 - define the Mozilla processor rules

break the HybridProcessor into set of processing rules for Processor2015.

This the definition of the steps that will be taken by the Mozilla verison of the processor.  Other projects can mix & match, remove or add their own steps/rules.  


If you do 
```python
add_option(...
    default=(
        "socorro.something.class1,"
        "socorro.something.class2,"
    )
```
Then when split on commas you have 3 elements. One which is empty and should be ignored.