Fix all the passedByValue warns detected by cppcheck

.gitlab-ci.yml

catalogue/SQLiteSchemaComparer.cpp

catalogue/SQLiteSchemaComparer.hpp

catalogue/SchemaChecker.cpp

catalogue/SchemaChecker.hpp

catalogue/SchemaComparer.cpp

catalogue/SchemaComparer.hpp

catalogue/SchemaSqlStatementsReader.cpp

catalogue/SchemaSqlStatementsReader.hpp

common/Configuration.cpp

common/Configuration.hpp

common/dataStructures/MountPolicy.cpp

common/dataStructures/MountPolicy.hpp

common/exception/XrootCl.cpp

common/exception/XrootCl.hpp

common/utils/utils.cpp

common/utils/utils.hpp

disk/DiskReporterFactory.cpp

disk/DiskReporterFactory.hpp

objectstore/Agent.cpp