Rename all error_code instances to ec

We're not consistent here, which leads to people copying and pasting
code all over, which has lead to a bunch of different names for error
codes.

This commit changes to coerce them all to "ec", because that's what
boost uses for a naming convention.

Tested: Rename only, code compiles.

Change-Id: I7053cc738faa9f7a82f55fc46fc78618bdf702a5
Signed-off-by: Ed Tanous <edtanous@google.com>
diff --git a/include/openbmc_dbus_rest.hpp b/include/openbmc_dbus_rest.hpp
index 4dbf12e..4807361 100644
--- a/include/openbmc_dbus_rest.hpp
+++ b/include/openbmc_dbus_rest.hpp
@@ -2369,9 +2369,9 @@
                     nlohmann::json& propertyItem = propertiesObj[name];
                     crow::connections::systemBus->async_send(
                         m, [&propertyItem,
-                            asyncResp](const boost::system::error_code& e,
+                            asyncResp](const boost::system::error_code& ec2,
                                        sdbusplus::message_t& msg) {
-                            if (e)
+                            if (ec2)
                             {
                                 return;
                             }