The name of the service should be configurable when generating OAuth tokens

[anonymouse64]

Currently, when generating OAuth tokens using the Kong plugin, the name of the application as specified by the Name parameter of the KongConsumerOauth2 struct is always hard-coded to be edgex. This should be configurable either through a command line option or a configuration.toml propery.

[tingyuz]

This issue will be addressed in delhi dot release.

[tingyuz]

Similar to issue #40, we will switch from hard-coded name to snis section of [secretservice] section in the configuration file. This will be addressed in Delhi dot release