PM-731 stricter check on whether we should rely on the environment variable in the site catalog for the execution site in order to bypass addition of credential transfer.
we bypass now only whne the credential required for a site is same the site on which the job executes.
For example, a vanilla universe transfer job that is set to run on site local and requires a credential for site bluewaters, the addition of credential will not be bypassed just because X509_USER_PROXY is set as an environment variable for the local site.