Reorganize the setEventReceiver code

This commit is to re-organise the code to make the
setEventReceiver optional when GetTID gets called.

Currently, it is being called on every GetTID command.
This is and OEM behaviour, which was implemented at -
https://gerrit.openbmc.org/c/openbmc/pldm/+/41779/36

Also, setEventReceiver is a command defined in the platform
Spec, so rightfully placing it under the platform handler.

Signed-off-by: Sagar Srinivas <sagar.srinivas@ibm.com>
Change-Id: Ib60e9d46a8eaf4806c5ec2e9575f4e219bc80eab
diff --git a/libpldmresponder/test/libpldmresponder_base_test.cpp b/libpldmresponder/test/libpldmresponder_base_test.cpp
index f056ec8..b1ca89d 100644
--- a/libpldmresponder/test/libpldmresponder_base_test.cpp
+++ b/libpldmresponder/test/libpldmresponder_base_test.cpp
@@ -17,12 +17,8 @@
 class TestBaseCommands : public testing::Test
 {
   protected:
-    TestBaseCommands() :
-        instanceIdDb(), event(sdeventplus::Event::get_default())
-    {}
+    TestBaseCommands() : event(sdeventplus::Event::get_default()) {}
 
-    uint8_t mctpEid = 0;
-    TestInstanceIdDb instanceIdDb;
     sdeventplus::Event event;
 };
 
@@ -32,7 +28,7 @@
     auto request = reinterpret_cast<pldm_msg*>(requestPayload.data());
     // payload length will be 0 in this case
     size_t requestPayloadLength = 0;
-    base::Handler handler(mctpEid, instanceIdDb, event, nullptr, nullptr);
+    base::Handler handler(event, nullptr);
     auto response = handler.getPLDMTypes(request, requestPayloadLength);
     // Need to support OEM type.
     auto responsePtr = reinterpret_cast<pldm_msg*>(response.data());
@@ -49,7 +45,7 @@
         requestPayload{};
     auto request = reinterpret_cast<pldm_msg*>(requestPayload.data());
     size_t requestPayloadLength = requestPayload.size() - sizeof(pldm_msg_hdr);
-    base::Handler handler(mctpEid, instanceIdDb, event, nullptr, nullptr);
+    base::Handler handler(event, nullptr);
     auto response = handler.getPLDMCommands(request, requestPayloadLength);
     auto responsePtr = reinterpret_cast<pldm_msg*>(response.data());
     uint8_t* payload_ptr = responsePtr->payload;
@@ -66,7 +62,7 @@
 
     request->payload[0] = 0xFF;
     size_t requestPayloadLength = requestPayload.size() - sizeof(pldm_msg_hdr);
-    base::Handler handler(mctpEid, instanceIdDb, event, nullptr, nullptr);
+    base::Handler handler(event, nullptr);
     auto response = handler.getPLDMCommands(request, requestPayloadLength);
     auto responsePtr = reinterpret_cast<pldm_msg*>(response.data());
     uint8_t* payload_ptr = responsePtr->payload;
@@ -91,7 +87,7 @@
 
     ASSERT_EQ(0, rc);
 
-    base::Handler handler(mctpEid, instanceIdDb, event, nullptr, nullptr);
+    base::Handler handler(event, nullptr);
     auto response = handler.getPLDMVersion(request, requestPayloadLength);
     auto responsePtr = reinterpret_cast<pldm_msg*>(response.data());
 
@@ -122,7 +118,7 @@
 
     ASSERT_EQ(0, rc);
 
-    base::Handler handler(mctpEid, instanceIdDb, event, nullptr, nullptr);
+    base::Handler handler(event, nullptr);
     auto response = handler.getPLDMVersion(request, requestPayloadLength - 1);
     auto responsePtr = reinterpret_cast<pldm_msg*>(response.data());
 
@@ -147,7 +143,7 @@
     auto request = reinterpret_cast<pldm_msg*>(requestPayload.data());
     size_t requestPayloadLength = 0;
 
-    base::Handler handler(mctpEid, instanceIdDb, event, nullptr, nullptr);
+    base::Handler handler(event, nullptr);
     auto response = handler.getTID(request, requestPayloadLength);
 
     auto responsePtr = reinterpret_cast<pldm_msg*>(response.data());