Be more lenient about test class names
Be more lenient about test class names

Look for classes that are derived from unittest.TestCase
instead of requiring a specific naming convention. This
allows tests that are for sub-components of the collector,
instead of the collector itself.

Signed-off-by: Doug Hellmann <8c845c26a3868dadec615703cd974244eb2ac6d1@dreamhost.com>

timchenxiaoyu/Diamond,thardie/Diamond,krbaker/Diamond,mzupan/Diamond,h00dy/Diamond,MichaelDoyle/Diamond,jriguera/Diamond,anandbhoraskar/Diamond,Ensighten/Diamond,jumping/Diamond,bmhatfield/Diamond,bmhatfield/Diamond,joel-airspring/Diamond,tellapart/Diamond,EzyInsights/Diamond,sebbrandt87/Diamond,datafiniti/Diamond,CYBERBUGJR/Diamond,janisz/Diamond-1,joel-airspring/Diamond,Ormod/Diamond,Ormod/Diamond,hamelg/Diamond,mfriedenhagen/Diamond,skbkontur/Diamond,cannium/Diamond,janisz/Diamond-1,metamx/Diamond,works-mobile/Diamond,saucelabs/Diamond,hamelg/Diamond,saucelabs/Diamond,gg7/diamond,TAKEALOT/Diamond,hamelg/Diamond,thardie/Diamond,Basis/Diamond,Ssawa/Diamond,codepython/Diamond,Nihn/Diamond-1,MichaelDoyle/Diamond,stuartbfox/Diamond,CYBERBUGJR/Diamond,h00dy/Diamond,datafiniti/Diamond,dcsquared13/Diamond,signalfx/Diamond,acquia/Diamond,jriguera/Diamond,bmhatfield/Diamond,ramjothikumar/Diamond,Precis/Diamond,Precis/Diamond,signalfx/Diamond,anandbhoraskar/Diamond,hvnsweeting/Diamond,saucelabs/Diamond,metamx/Diamond,szibis/Diamond,krbaker/Diamond,tusharmakkar08/Diamond,Ssawa/Diamond,ramjothikumar/Diamond,Nihn/Diamond-1,tuenti/Diamond,Clever/Diamond,eMerzh/Diamond-1,stuartbfox/Diamond,russss/Diamond,datafiniti/Diamond,szibis/Diamond,EzyInsights/Diamond,works-mobile/Diamond,gg7/diamond,skbkontur/Diamond,mfriedenhagen/Diamond,Netuitive/netuitive-diamond,Netuitive/Diamond,zoidbergwill/Diamond,ceph/Diamond,TAKEALOT/Diamond,jumping/Diamond,TinLe/Diamond,eMerzh/Diamond-1,Slach/Diamond,codepython/Diamond,tusharmakkar08/Diamond,Netuitive/netuitive-diamond,Ormod/Diamond,skbkontur/Diamond,Nihn/Diamond-1,datafiniti/Diamond,CYBERBUGJR/Diamond,EzyInsights/Diamond,tellapart/Diamond,saucelabs/Diamond,hvnsweeting/Diamond,timchenxiaoyu/Diamond,python-diamond/Diamond,TinLe/Diamond,anandbhoraskar/Diamond,mzupan/Diamond,disqus/Diamond,zoidbergwill/Diamond,timchenxiaoyu/Diamond,Basis/Diamond,Slach/Diamond,disqus/Diamond,MediaMath/Diamond,Ssawa/Diamond,works-mobile/Diamond,mfriedenhagen/Diamond,ceph/Diamond,Ssawa/Diamond,Netuitive/Diamond,dcsquared13/Diamond,actmd/Diamond,anandbhoraskar/Diamond,russss/Diamond,stuartbfox/Diamond,socialwareinc/Diamond,tuenti/Diamond,ramjothikumar/Diamond,eMerzh/Diamond-1,tusharmakkar08/Diamond,works-mobile/Diamond,codepython/Diamond,Clever/Diamond,rtoma/Diamond,rtoma/Diamond,python-diamond/Diamond,ceph/Diamond,h00dy/Diamond,tellapart/Diamond,actmd/Diamond,EzyInsights/Diamond,joel-airspring/Diamond,MediaMath/Diamond,eMerzh/Diamond-1,TinLe/Diamond,jaingaurav/Diamond,russss/Diamond,zoidbergwill/Diamond,Ensighten/Diamond,Clever/Diamond,tuenti/Diamond,jriguera/Diamond,Netuitive/Diamond,Netuitive/Diamond,mzupan/Diamond,szibis/Diamond,thardie/Diamond,jriguera/Diamond,rtoma/Diamond,MichaelDoyle/Diamond,ceph/Diamond,Clever/Diamond,Slach/Diamond,python-diamond/Diamond,disqus/Diamond,MichaelDoyle/Diamond,signalfx/Diamond,janisz/Diamond-1,TinLe/Diamond,cannium/Diamond,actmd/Diamond,bmhatfield/Diamond,codepython/Diamond,Basis/Diamond,tellapart/Diamond,signalfx/Diamond,Basis/Diamond,skbkontur/Diamond,cannium/Diamond,jaingaurav/Diamond,actmd/Diamond,sebbrandt87/Diamond,Ensighten/Diamond,krbaker/Diamond,TAKEALOT/Diamond,stuartbfox/Diamond,zoidbergwill/Diamond,dcsquared13/Diamond,sebbrandt87/Diamond,CYBERBUGJR/Diamond,Ormod/Diamond,jumping/Diamond,Nihn/Diamond-1,jaingaurav/Diamond,joel-airspring/Diamond,hvnsweeting/Diamond,rtoma/Diamond,TAKEALOT/Diamond,metamx/Diamond,socialwareinc/Diamond,gg7/diamond,tusharmakkar08/Diamond,Precis/Diamond,hamelg/Diamond,h00dy/Diamond,acquia/Diamond,jumping/Diamond,acquia/Diamond,tuenti/Diamond,mfriedenhagen/Diamond,MediaMath/Diamond,ramjothikumar/Diamond,MediaMath/Diamond,janisz/Diamond-1,Netuitive/netuitive-diamond,mzupan/Diamond,acquia/Diamond,Ensighten/Diamond,dcsquared13/Diamond,jaingaurav/Diamond,Slach/Diamond,Precis/Diamond,sebbrandt87/Diamond,socialwareinc/Diamond,russss/Diamond,hvnsweeting/Diamond,Netuitive/netuitive-diamond,socialwareinc/Diamond,timchenxiaoyu/Diamond,thardie/Diamond,szibis/Diamond,krbaker/Diamond,gg7/diamond,cannium/Diamond