added additional authority matches

[shriramsharma]

added additional authority matches

Sample VS

  hosts:
  - stage.greeting.global
  http:
  - match:
    - authority:
        prefix: stage.greeting.global
    - authority:
        prefix: stage.Greeting.global
    name: stage.greeting.global
    route:
    - destination:
        host: greeting.sample.svc.cluster.local
        port:
          number: 80

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.85%. Comparing base (dcdd1dc) to head (2f6b3b6).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #436      +/-   ##
==========================================
+ Coverage   75.75%   75.85%   +0.09%     
==========================================
  Files          73       73              
  Lines       12495    12510      +15     
==========================================
+ Hits         9466     9489      +23     
+ Misses       2512     2505       -7     
+ Partials      517      516       -1     

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