patch for issue: 291,289,279,255. YG
fix keyError for insertdatatier and add a new config. YG
move commit right after insertdatatier and rollback in finally. YG
Merge pull request #294 from yuyiguo/HG1401-patch2-24

patch for issue: 291,289,279,255. YG
Return error in case of misspelled urls
View instances for db mapping
Merge pull request #295 from giffels/dbs3-client-url-check

Return error in case of misspelled urls
Adjust client test to new db mappings.
Merge pull request #296 from giffels/dbs3-client-test-url-fix

Adjust client test to new db mappings.
Add Server and Client tests for serverinfo api
Merge pull request #300 from giffels/dbs3-version-tests

Add Server and Client tests for serverinfo api
Adding possibilty to add additional curl options
Make pycurl thread safe
Adding shared curl handle to pycurl client
Share curl ssl, dns and cookie caches between threads
Close db connection when migration already queued.
Merge pull request #306 from giffels/dbs3-pycurl-optimization

Dbs3 pycurl optimization
Add loose input validation for get requests of DBS 2 data
Merge pull request #307 from giffels/dbs3-input-validation-reading

Add loose input validation for get requests of DBS 2 data
Wildcard support for DBS 2 datasets