ci: compute correct coverage value

14 jobs for global-coverage in 14 minutes and 19 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Test
passed py3.5-min-mysql #36731

00:09:32

passed py3.5-min-postgresql #36729

00:09:21

passed py3.5-min-sqlite #36727

00:09:08

passed py3.5-pypi-mysql #36732

00:13:49

passed py3.5-pypi-postgresql #36730

00:09:45

passed py3.5-pypi-sqlite #36728

00:09:40

passed py3.6-min-mysql #36737

00:10:01

passed py3.6-min-postgresql #36735

00:09:32

passed py3.6-min-sqlite #36733

00:11:33

passed py3.6-pypi-mysql #36738

00:10:26

passed py3.6-pypi-postgresql #36736

00:10:16

passed py3.6-pypi-sqlite #36734

00:09:39

passed test-docs #36739

00:03:57

 
  Coverage
passed global-coverage #36740

00:00:29

95.0%