Corrected format of LocaleId in LocalizedText attributes

The LocaleIds was formatted with an underscore as separator between
the language and region. According to the OPC UA specification the
language and the region shall be separated by a hyphen.
Also removed LocaleId in those cases where a specific language is not
addressed, i.e. when presenting a type name.

tests/check_services_attributes.c

@@ -335,7 +335,7 @@ START_TEST(ReadSingleAttributeInverseNameWithoutTimestamp) {
     UA_DataValue resp = UA_Server_read(server, &rvi, UA_TIMESTAMPSTORETURN_NEITHER);
 
     UA_LocalizedText* respval = (UA_LocalizedText*) resp.value.data;
-    const UA_LocalizedText comp = UA_LOCALIZEDTEXT("en-US", "OrganizedBy");
+    const UA_LocalizedText comp = UA_LOCALIZEDTEXT("", "OrganizedBy");
     ck_assert_int_eq(0, resp.value.arrayLength);
     ck_assert_ptr_eq(&UA_TYPES[UA_TYPES_LOCALIZEDTEXT],resp.value.type);
     ck_assert(UA_String_equal(&comp.text, &respval->text));
@@ -597,7 +597,7 @@ START_TEST(WriteSingleAttributeBrowseName) {
 START_TEST(WriteSingleAttributeDisplayName) {
     UA_WriteValue wValue;
     UA_WriteValue_init(&wValue);
-    UA_LocalizedText testValue = UA_LOCALIZEDTEXT("en_EN", "the.answer");
+    UA_LocalizedText testValue = UA_LOCALIZEDTEXT("en-EN", "the.answer");
     UA_Variant_setScalar(&wValue.value.value, &testValue, &UA_TYPES[UA_TYPES_LOCALIZEDTEXT]);
     wValue.value.hasValue = true;
     wValue.nodeId = UA_NODEID_STRING(1, "the.answer");
@@ -609,7 +609,7 @@ START_TEST(WriteSingleAttributeDisplayName) {
 START_TEST(WriteSingleAttributeDescription) {
     UA_WriteValue wValue;
     UA_WriteValue_init(&wValue);
-    UA_LocalizedText testValue = UA_LOCALIZEDTEXT("en_EN", "the.answer");
+    UA_LocalizedText testValue = UA_LOCALIZEDTEXT("en-EN", "the.answer");
     UA_Variant_setScalar(&wValue.value.value, &testValue, &UA_TYPES[UA_TYPES_LOCALIZEDTEXT]);
     wValue.value.hasValue = true;
     wValue.nodeId = UA_NODEID_STRING(1, "the.answer");