Ensured that tests are skipped for wrong conn string, also m_log chng
Ensured that tests are skipped for wrong conn string, also m_log chng

The base test class now tries to connect to DB, ignores all tests in the
class if unable to.

Also m_log changed to instance field (which in this case shouldn't cause
any problems),  to avoid having to define it separately in each derived
class.  Here I touched things that I don't understand well (using log4net),
so please review this commit.

M-O-S-E-S/opensim,OpenSimian/opensimulator,justinccdev/opensim,QuillLittlefeather/opensim-1,ft-/arribasim-dev-extras,cdbean/CySim,AlexRa/opensim-mods-Alex,ft-/arribasim-dev-tests,rryk/omp-server,ft-/opensim-optimizations-wip-tests,Michelle-Argus/ArribasimExtract,RavenB/opensim,ft-/opensim-optimizations-wip-extras,rryk/omp-server,ft-/opensim-optimizations-wip,cdbean/CySim,BogusCurry/arribasim-dev,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,ft-/arribasim-dev-extras,TechplexEngineer/Aurora-Sim,cdbean/CySim,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,ft-/opensim-optimizations-wip-extras,Michelle-Argus/ArribasimExtract,ft-/opensim-optimizations-wip-tests,AlexRa/opensim-mods-Alex,RavenB/opensim,bravelittlescientist/opensim-performance,ft-/arribasim-dev-extras,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,M-O-S-E-S/opensim,RavenB/opensim,ft-/opensim-optimizations-wip-extras,RavenB/opensim,TechplexEngineer/Aurora-Sim,AlexRa/opensim-mods-Alex,QuillLittlefeather/opensim-1,bravelittlescientist/opensim-performance,OpenSimian/opensimulator,rryk/omp-server,allquixotic/opensim-autobackup,TomDataworks/opensim,TomDataworks/opensim,ft-/opensim-optimizations-wip-tests,allquixotic/opensim-autobackup,justinccdev/opensim,ft-/opensim-optimizations-wip-tests,justinccdev/opensim,bravelittlescientist/opensim-performance,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,ft-/arribasim-dev-tests,ft-/arribasim-dev-extras,allquixotic/opensim-autobackup,bravelittlescientist/opensim-performance,TomDataworks/opensim,rryk/omp-server,ft-/arribasim-dev-tests,M-O-S-E-S/opensim,ft-/arribasim-dev-extras,ft-/arribasim-dev-tests,justinccdev/opensim,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,TomDataworks/opensim,Michelle-Argus/ArribasimExtract,allquixotic/opensim-autobackup,ft-/opensim-optimizations-wip-extras,allquixotic/opensim-autobackup,TechplexEngineer/Aurora-Sim,TechplexEngineer/Aurora-Sim,ft-/opensim-optimizations-wip,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,Michelle-Argus/ArribasimExtract,OpenSimian/opensimulator,allquixotic/opensim-autobackup,BogusCurry/arribasim-dev,QuillLittlefeather/opensim-1,M-O-S-E-S/opensim,TomDataworks/opensim,OpenSimian/opensimulator,AlexRa/opensim-mods-Alex,M-O-S-E-S/opensim,RavenB/opensim,AlexRa/opensim-mods-Alex,rryk/omp-server,ft-/arribasim-dev-extras,QuillLittlefeather/opensim-1,OpenSimian/opensimulator,ft-/opensim-optimizations-wip,M-O-S-E-S/opensim,cdbean/CySim,RavenB/opensim,TomDataworks/opensim,OpenSimian/opensimulator,ft-/opensim-optimizations-wip-tests,bravelittlescientist/opensim-performance,ft-/arribasim-dev-tests,ft-/arribasim-dev-tests,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,BogusCurry/arribasim-dev,cdbean/CySim,ft-/opensim-optimizations-wip-extras,BogusCurry/arribasim-dev,rryk/omp-server,ft-/opensim-optimizations-wip,M-O-S-E-S/opensim,QuillLittlefeather/opensim-1,justinccdev/opensim,bravelittlescientist/opensim-performance,QuillLittlefeather/opensim-1,AlexRa/opensim-mods-Alex,BogusCurry/arribasim-dev,RavenB/opensim,TomDataworks/opensim,Michelle-Argus/ArribasimExtract,justinccdev/opensim,cdbean/CySim,QuillLittlefeather/opensim-1,BogusCurry/arribasim-dev,OpenSimian/opensimulator,Michelle-Argus/ArribasimExtract