Change so tests return -1 in rating if Tests are unable to connect

[marcusosterberg]

[7h3Rabbit]

@marcusosterberg need example to reproduce problem

[7h3Rabbit]

Example of tests returning other then -1 today:

• Validate CSS (W3C)

Example of tests retuning -1 today:

• Website performance (SiteSpeed)
• Security, data-protecting & Integrity (Webbkoll)

[7h3Rabbit]

We should probably also write some kind of review text when this happens, today it looks like follows on webperf.se when it happens:

[7h3Rabbit]

IF a test fail because it cannot connect to url the rating is set to -1.0 AND the data object has a key called "failed".