accel: rename `accelOobGetDbus` to `getBus`

accelOobGetDbus returns a dbus bus which can be leverage by others.
Rename it to a more common name.

Tested: Unittest passed.
Signed-off-by: Michael Shen <gpgpgp@google.com>
Change-Id: I0e48f7f6a49c09b397d52e9343bc3e32ca41d9d8
diff --git a/test/handler_unittest.cpp b/test/handler_unittest.cpp
index 2edb977..5af16ad 100644
--- a/test/handler_unittest.cpp
+++ b/test/handler_unittest.cpp
@@ -146,7 +146,7 @@
     }
 
   protected:
-    sdbusplus::bus::bus accelOobGetDbus() const override
+    sdbusplus::bus::bus getDbus() const override
     {
         return sdbusplus::get_mocked_new(
             const_cast<sdbusplus::SdBusMock*>(mock_));
@@ -299,14 +299,15 @@
     EXPECT_CALL(mock, sd_bus_message_exit_container(msg)).WillOnce(Return(1));
 }
 
-void ExpectSdBusError(StrictMock<sdbusplus::SdBusMock>& mock)
+void ExpectSdBusError(StrictMock<sdbusplus::SdBusMock>& mock,
+                      const std::string& service, const std::string& objPath,
+                      const std::string& interface, const std::string& function)
 {
-    EXPECT_CALL(mock, sd_bus_message_new_method_call(
-                          _,         // sd_bus *bus,
-                          NotNull(), // sd_bus_message **m
-                          StrEq("com.google.custom_accel"), StrEq("/"),
-                          StrEq("org.freedesktop.DBus.ObjectManager"),
-                          StrEq("GetManagedObjects")))
+    EXPECT_CALL(
+        mock, sd_bus_message_new_method_call(_,         // sd_bus *bus,
+                                             NotNull(), // sd_bus_message **m
+                                             StrEq(service), StrEq(objPath),
+                                             StrEq(interface), StrEq(function)))
         .WillOnce(Return(-ENOTCONN));
 }
 
@@ -322,7 +323,8 @@
 {
     StrictMock<sdbusplus::SdBusMock> mock;
     MockDbusHandler h(mock);
-    ExpectSdBusError(mock);
+    ExpectSdBusError(mock, "com.google.custom_accel", "/",
+                     "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
     EXPECT_THROW(h.accelOobDeviceCount(), IpmiException);
 }
 
@@ -338,7 +340,8 @@
 {
     StrictMock<sdbusplus::SdBusMock> mock;
     MockDbusHandler h(mock);
-    ExpectSdBusError(mock);
+    ExpectSdBusError(mock, "com.google.custom_accel", "/",
+                     "org.freedesktop.DBus.ObjectManager", "GetManagedObjects");
     EXPECT_THROW(h.accelOobDeviceName(0), IpmiException);
 }