SCB-317 Update the cors license

[asifdxtreme]

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[coveralls]

Coverage decreased (-0.01%) to 73.876% when pulling 063d951 on asifdxtreme:cors into e9a498a on apache:master.

[codecov-io]

Codecov Report

Merging #273 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #273      +/-   ##
==========================================
+ Coverage   70.33%   70.36%   +0.02%     
==========================================
  Files          17       17              
  Lines        3418     3418              
==========================================
+ Hits         2404     2405       +1     
  Misses        846      846              
+ Partials      168      167       -1

Impacted Files	Coverage Δ
server/service/service_dependency.go	73.04% <0%> (ø)	⬆️
server/service/rule.go	76.82% <0%> (ø)	⬆️
server/service/instances.go	71.28% <0%> (+0.16%)	⬆️

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[WillemJiang]

Please remove the Apache License header as we can only put the Apache License header to the code which we have the copyright.

[WillemJiang]

Please remove the ASL header of the cors.go, add a comment that you did some modification of the original code.

[asifdxtreme]

@WillemJiang Thanks for the suggestion, I have removed the ASl header and added a comment that original code was modified to suit the Service-Center use case