Use initialization list to initialize m_service

- This is correct because base class is initialized before members are
  initialized.
- Removes cppcheck suppression by addressing reported issue.
- Leverage C++11's 'default member initializer' to initialize m_provider
  & m_demandsPassword and address Sonarcloud issue.

src/operators/rbl.h

@@ -33,8 +33,8 @@
 #include "src/operators/operator.h"
 
 
-namespace modsecurity {
-namespace operators {
+namespace modsecurity::operators {
+
 
 class Rbl : public Operator {
  public:
@@ -66,11 +66,8 @@ class Rbl : public Operator {
 
     /** @ingroup ModSecurity_Operator */
     explicit Rbl(std::unique_ptr<RunTimeString> param)
-        : m_service(),
-        m_demandsPassword(false),
-        m_provider(RblProvider::UnknownProvider),
-        Operator("Rbl", std::move(param)) {
-        m_service = m_string->evaluate(); // cppcheck-suppress useInitializationList
+        : Operator("Rbl", std::move(param)),
+        m_service(m_string->evaluate()) {
         if (m_service.find("httpbl.org") != std::string::npos)
         {
             m_demandsPassword = true;
@@ -98,12 +95,12 @@ class Rbl : public Operator {
 
  private:
     std::string m_service;
-    bool m_demandsPassword;
-    RblProvider m_provider;
+    bool m_demandsPassword = false;
+    RblProvider m_provider = RblProvider::UnknownProvider;
 };
 
-}  // namespace operators
-}  // namespace modsecurity
+
+}  // namespace modsecurity::operators
 
 
 #endif  // SRC_OPERATORS_RBL_H_