PCKRetrievalTool : incorrect processing of the command line argument -use_secure_cert

The command line argument "-use_secure_cert false" is ignored unless it is also present in the file
"network_setting.conf". However, the file "network_setting.conf" does not contain any default setting for the variable "USE_SECURE_CERT" (it is commented out and hence ignored). Basically, the code always defaults to
USE_SECURE_CERT=TRUE.

So this call will fail with an error:

****# ./PCKIDRetrievalTool -use_secure_cert false**
Error: network error, please check the network setting or whether the cache server is down.
Error: the data couldn't be sent to cache server!**

However, if the file network_setting.conf contains either line:
USE_SECURE_CERT=TRUE
or
USE_SECURE_CERT=FALSE
or even
USE_SECURE_CERT=BOGUS

the same call that failed before now succeeds:

**Intel(R) Software Guard Extensions PCK Cert ID Retrieval Tool Version 1.14.100.3
Registration status has been set to completed status.
the data has been sent to cache server successfully!**

Considering the only purpose of the command line arguments is to not to depend on the network_setting.conf, this is a very unfortunate bug.