change sdc to logback and define logs
adapt to sl4j imports and interface for logback
appenders definition
setup file rolling policy
Merge pull request #27 from hmunfru/issues/cleanupSDCcode_11

Clean SDC code and properties
solving merge conflicts
unify log variable
fix refactor naming error
fix integration bugs found
add exception when hostname not found in chefserver
fix call to openStackRegion.getPuppetEndPoint
Merge pull request #33 from jesuspg/bug/chefclientname_unknown

add exception when hostname not found in chefserver
integration bug fixing
integration bug fixing - forgotten file
fix merge conflicts
Merge pull request #31 from alberts-tid/task/error_logging_fix

Task/error logging fix
Merge branch 'develop' of https://github.com/telefonicaid/fiware-sdc into issues/cleanupSDCcode_11

Conflicts:
	core/src/main/java/com/telefonica/euro_iaas/sdc/dao/impl/ChefClientDaoRestImpl.java