* Include platform info in name.
Get SONiC Version as parameter and use
Make additional tag as optional.
Avoid repetitions by using function.
* Per review comments, make SONIC_VERSION optional and added some comments.
* 1) Added additional params are optional
2) Handle DOCKER_IMAGE_TAG only if given
3) Use BUILD_NUMBER only if SONIC_VERSION not given
4) Tag with SONIC_VERSION if given.
Current behavior is not changed, unless SONIC_VERSION is given.
* Update per review comments
1) Added new args with options
2) Handle PORT possible being empty
3) Exhibit new behavior only if both version & platform are given.
* Drop redundant quotes
