protocols: unit tests are failing

[devimc]

Some unit tests are failing with Golang 1.13

-timeout 30s'

=== RUN   TestNewAgentClient

--- FAIL: TestNewAgentClient (1.01s)

	Error Trace:	client_test.go:114

			client_test.go:124

			client_test.go:134

	Error:      	Should be true

	Test:       	TestNewAgentClient

	Messages:   	expect err message: Invalid vsock port	got: parse vsock://100:bar: invalid port ":bar" after host

=== RUN   TestNewAgentClientWithYamux

--- FAIL: TestNewAgentClientWithYamux (1.02s)

	Error Trace:	client_test.go:114

			client_test.go:148

			client_test.go:156

	Error:      	Should be true

	Test:       	TestNewAgentClientWithYamux

	Messages:   	expect err message: Invalid vsock port	got: parse vsock://100:bar: invalid port ":bar" after host

=== RUN   TestParseGrpcHybridVSockAddr

--- PASS: TestParseGrpcHybridVSockAddr (0.00s)

FAIL

coverage: 62.7% of statements