Use context.WithTimeout instead of grpc.WithTimeout

[jxlwqq]

WithTimeout returns a DialOption that configures a timeout for dialing a ClientConn initially.

This is valid if and only if WithBlock() is present.

Deprecated: use DialContext and context.WithTimeout instead.

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[jxlwqq]

@googlebot I signed it!

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[bourgeoisor]

@jxlwqq I found an instance of Dial, which if I'm reading this right should be changed to DialContext as well:

microservices-demo/src/productcatalogservice/server_test.go

Line 33 in d2c729d

conn, err := grpc.Dial(addr,

Could you make that change in this PR?

[jxlwqq]

Changed. @bourgeoisor

[bourgeoisor]

LGTM. Deployed and tested, looks good.