C++ exception with description ":- cleanup_macsec_device: Cannot show MACsec ports"

[kcudnik]

Error popped out here: sonic-net/sonic-buildimage#6202

C++ exception with description ":- cleanup_macsec_device: Cannot show MACsec ports" thrown in SetUp(). this is by macsec issue

and it's related to this code:

index 8e9cdcc..b6cfe0a 100644
--- a/vslib/src/MACsecManager.cpp
+++ b/vslib/src/MACsecManager.cpp
@@ -835,7 +835,7 @@ void MACsecManager::cleanup_macsec_device() const

     std::string macsecInfos;

-    if (!exec("ip macsec show", macsecInfos))
+    if (!exec("/sbin/ip macsec show", macsecInfos))
     {

since "ip" command may not be in default user PATH, then sh/bash will not find it, resolution is to put explicit /sbin/ip path or add string variable that could be changed

exception is thrown in MACsecManager constructor when calling cleanup_macsec_device

[kcudnik]

@Pterosaur can you take a look?