[2650] Add cppcheck suppressions

src/lib/datasrc/memory/zone_finder.cc

@@ -573,6 +573,7 @@ FindNodeResult findNode(const ZoneData& zone_data,
 /// For (successful) type ANY query, found_node points to the
 /// corresponding zone node, which is recorded within this specialized
 /// context.
+// cppcheck-suppress noConstructor
 class InMemoryZoneFinder::Context : public ZoneFinder::Context {
 public:
     Context(InMemoryZoneFinder& finder, ZoneFinder::FindOptions options,

src/lib/datasrc/memory_datasrc.cc

@@ -782,6 +782,7 @@ struct RBNodeResultContext {
 };
 }
 
+// cppcheck-suppress noConstructor
 class InMemoryZoneFinder::Context : public ZoneFinder::Context {
 public:
     /// \brief Constructor.

src/lib/datasrc/sqlite3_accessor.cc

@@ -682,6 +682,8 @@ convertToPlainChar(const unsigned char* ucp, sqlite3 *db) {
 }
 
 }
+
+// cppcheck-suppress noConstructor
 class SQLite3Accessor::Context : public DatabaseAccessor::IteratorContext {
 public:
     // Construct an iterator for all records. When constructed this
@@ -887,6 +889,7 @@ SQLite3Accessor::getAllRecords(int id) const {
 /// This iterator is used to search through the differences table for the
 /// resouce records making up an IXFR between two versions of a zone.
 
+// cppcheck-suppress noConstructor
 class SQLite3Accessor::DiffContext : public DatabaseAccessor::IteratorContext {
 public:
 

src/lib/dns/master_loader.cc

@@ -54,6 +54,7 @@ public:
 
 } // end unnamed namespace
 
+// cppcheck-suppress noConstructor
 class MasterLoader::MasterLoaderImpl {
 public:
     MasterLoaderImpl(const char* master_file,