Making the tests suite DRY

[ankitchiplunkar]

Types of changes

What types of changes does your code introduce to ether_sql? Put an x in the boxes that apply

• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

Explain your changes

We perform similar tests on both infura and parity nodes, but unfortunately the test code was being copied across both the directories. This removes duplication between the two directories.

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• [x] I have read the CONTRIBUTING doc
• [x] Lint and unit tests pass locally with my changes
• [x] I have added tests that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation (if appropriate)

Where has this been tested?

Operating System: Ubuntu 16.04

Node: Infura and Parity

[ankitchiplunkar]

• [x] I have added necessary documentation (if appropriate)

All tests passing coverage 88%

----------------------------------------------- coverage: platform linux, python 3.6.5-final-0 ------------------------------------------------
Name                                                         Stmts   Miss  Cover
--------------------------------------------------------------------------------
ether_sql/__init__.py                                            0      0   100%
ether_sql/cli/__init__.py                                       46      8    83%
ether_sql/cli/ether.py                                           9      0   100%
ether_sql/cli/sql.py                                            36      4    89%
ether_sql/constants.py                                           3      0   100%
ether_sql/migrations/env.py                                     25      5    80%
ether_sql/migrations/versions/10f48d555d4a_first_change.py      32      0   100%
ether_sql/models/__init__.py                                     8      0   100%
ether_sql/models/blocks.py                                      29      1    97%
ether_sql/models/logs.py                                        45     14    69%
ether_sql/models/receipts.py                                    24      2    92%
ether_sql/models/traces.py                                      59     18    69%
ether_sql/models/transactions.py                                29      1    97%
ether_sql/models/uncles.py                                      28      1    96%
ether_sql/scrapper.py                                           43      0   100%
ether_sql/session.py                                            67     10    85%
ether_sql/settings.py                                           29      0   100%
ether_sql/utils.py                                              17      0   100%
--------------------------------------------------------------------------------
TOTAL                                                          529     64    88%