quell cppcheck warnings for non-explicit constructor

- the implicit casts from std::string/char* is part of the design for
the view class so we do not want to disable those.
- intializer list constructors should be implicitly called

opm/parser/eclipse/Deck/Deck.hpp

@@ -120,7 +120,9 @@ namespace Opm {
             using iterator = std::vector< DeckKeyword >::iterator;
 
             Deck();
+            // cppcheck-suppress noExplicitConstructor
             Deck( std::initializer_list< DeckKeyword > );
+            // cppcheck-suppress noExplicitConstructor
             Deck( std::initializer_list< std::string > );
             void addKeyword( DeckKeyword&& keyword );
             void addKeyword( const DeckKeyword& keyword );

opm/parser/eclipse/EclipseState/Schedule/CompletionSet.hpp

@@ -28,6 +28,7 @@ namespace Opm {
     class CompletionSet {
     public:
         CompletionSet() = default;
+        // cppcheck-suppress noExplicitConstructor
         CompletionSet( std::initializer_list< Completion > );
 
         using const_iterator = std::vector< Completion >::const_iterator;

opm/parser/eclipse/Utility/Stringview.hpp

@@ -52,8 +52,10 @@ namespace Opm {
             inline string_view() = default;
             inline string_view( const_iterator, const_iterator );
             inline string_view( const_iterator, size_t );
+            //cppcheck-suppress noExplicitConstructor
             inline string_view( const std::string& );
             inline string_view( const std::string&, size_t );
+            //cppcheck-suppress noExplicitConstructor
             inline string_view( const char* );
 
             inline const_iterator begin() const;