add constants to represent no flags

:Release Notes:

:Detailed Notes:
- added LUNA_METHOD_FLAGS_NONE
- added LUNA_SIGNAL_FLAGS_NONE
- added LUNA_PROPERTY_FLAGS_NONE

:Testing Performed:
desktop build

:QA Notes:

:Issues Addressed:
[CMB-2041] Add constants to represent no flags in luna-service2

Open-webOS-DCO-1.0-Signed-off-by: Nikolay Orliuk <nikolay.orliuk@lge.com>

Change-Id: I24f9628f6a68360e61585c3f80d9f1932abb335e
Reviewed-on: https://g2g.lgsvl.com/6526
Reviewed-by: DCO Verification
Reviewed-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>
Reviewed-by: Alekseyev Oleksandr <alekseyev.oleksandr@lge.com>
Reviewed-by: Nikolay Orliuk <nikolay.orliuk@lge.com>
Tested-by: Nikolay Orliuk <nikolay.orliuk@lge.com>

include/public/luna-service2++/handle.hpp

@@ -38,7 +38,7 @@ namespace LS {
       &LS::Handle::methodWraper<cl_t, &cl_t::name>,     \
       static_cast<LSMethodFlags>(flags) },
 
-#define LS_CATEGORY_METHOD1(name) LS_CATEGORY_METHOD2(name,0)
+#define LS_CATEGORY_METHOD1(name) LS_CATEGORY_METHOD2(name, LUNA_METHOD_FLAGS_NONE)
 
 #define GET_METHOD_MACRO(_1,_2,NAME,...) NAME
 

include/public/luna-service2/lunaservice.h

@@ -212,6 +212,11 @@ typedef enum {
 	 */
 	LUNA_METHOD_FLAG_VALIDATE_IN = (1 << 1),
 
+	/**
+	 * Constant to reprsent method with no flags turned on
+	 */
+	LUNA_METHOD_FLAGS_NONE = 0,
+
 	/**
 	 * Mask that covers all valid method flags. Anything outside treated as an
 	 * error.
@@ -226,13 +231,23 @@ typedef enum {
  */
 typedef enum {
 	LUNA_SIGNAL_FLAG_DEPRECATED = (1 << 0),
+
+	/**
+	 * Constant to reprsent method with no flags turned on
+	 */
+	LUNA_SIGNAL_FLAGS_NONE = 0,
 } LSSignalFlags;
 
 /**
  * @brief Property flags
  */
 typedef enum {
 	LUNA_PROPERTY_FLAG_DEPRECATED = (1 << 0),
+
+	/**
+	 * Constant to reprsent property with no flags turned on
+	 */
+	LUNA_PROPERTY_FLAGS_NONE = 0,
 } LSPropertyFlags;
 
 typedef struct {