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/redfish-core/lib/sensors.hpp b/redfish-core/lib/sensors.hpp
index 011e670..b5d0127 100644
--- a/redfish-core/lib/sensors.hpp
+++ b/redfish-core/lib/sensors.hpp
@@ -570,11 +570,11 @@
             sensorPath,
             [asyncResp, chassisSubNode, sensorTypes,
              callback{std::forward<const Callback>(callback)}](
-                const boost::system::error_code& e,
+                const boost::system::error_code& ec2,
                 const dbus::utility::MapperEndPoints& nodeSensorList) {
-            if (e)
+            if (ec2)
             {
-                if (e.value() != EBADR)
+                if (ec2.value() != EBADR)
                 {
                     messages::internalError(asyncResp->res);
                     return;
@@ -1010,9 +1010,9 @@
             dbus::utility::getAssociationEndPoints(
                 path + "/chassis",
                 [path, owner, sensorsAsyncResp](
-                    const boost::system::error_code& e,
+                    const boost::system::error_code& ec2,
                     const dbus::utility::MapperEndPoints& endpoints) {
-                if (e)
+                if (ec2)
                 {
                     return; // if they don't have an association we
                             // can't tell what chassis is
@@ -1032,9 +1032,9 @@
                     *crow::connections::systemBus, owner, path,
                     "xyz.openbmc_project.Control.FanRedundancy",
                     [path, sensorsAsyncResp](
-                        const boost::system::error_code& err,
+                        const boost::system::error_code& ec3,
                         const dbus::utility::DBusPropertiesMap& ret) {
-                    if (err)
+                    if (ec3)
                     {
                         return; // don't have to have this
                                 // interface