Enable readability-implicit-bool-conversion checks

These checks ensure that we're not implicitly converting ints or
pointers into bools, which makes the code easier to read.

Tested:
Ran series through redfish service validator.  No changes observed.
UUID failing in Qemu both before and after.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I1ca0be980d136bd4e5474341f4fd62f2f6bbdbae
diff --git a/redfish-core/lib/ethernet.hpp b/redfish-core/lib/ethernet.hpp
index 5283fff..9b1aa43 100644
--- a/redfish-core/lib/ethernet.hpp
+++ b/redfish-core/lib/ethernet.hpp
@@ -685,7 +685,7 @@
             // Count bits
             for (long bitIdx = 7; bitIdx >= 0; bitIdx--)
             {
-                if (value & (1L << bitIdx))
+                if ((value & (1L << bitIdx)) != 0)
                 {
                     if (firstZeroInByteHit)
                     {
@@ -2355,7 +2355,7 @@
                     return;
                 }
                 // Need both vlanId and vlanEnable to service this request
-                if (!vlanId)
+                if (vlanId == 0u)
                 {
                     messages::propertyMissing(asyncResp->res, "VLANId");
                 }