securityeval: Rename Validation to Evaluation

CMakeLists.txt

src/account.cpp

src/account.h

src/private/account_p.h

src/private/securityevaluationmodel_p.h

src/private/securityflaw_p.h

src/securityevaluationmodel.cpp

src/securityevaluationmodel.h

src/securityflaw.cpp

src/securityflaw.h