Adjust tests for changes in Go 1.12.8 / 1.11.13

Adjust tests for changes in Go 1.12.8 / 1.11.13

For now, just verifying that an error is returned, but not checking the
error message itself, because those are not under our control, and may
change with different Go versions.

```
=== Failed
=== FAIL: opts TestParseDockerDaemonHost (0.00s)
    hosts_test.go:87: tcp tcp:a.b.c.d address expected error "Invalid bind address format: tcp:a.b.c.d" return, got "parse tcp://tcp:a.b.c.d: invalid port \":a.b.c.d\" after host" and addr
    hosts_test.go:87: tcp tcp:a.b.c.d/path address expected error "Invalid bind address format: tcp:a.b.c.d/path" return, got "parse tcp://tcp:a.b.c.d/path: invalid port \":a.b.c.d\" after host" and addr

=== FAIL: opts TestParseTCP (0.00s)
    hosts_test.go:129: tcp tcp:a.b.c.d address expected error Invalid bind address format: tcp:a.b.c.d return, got parse tcp://tcp:a.b.c.d: invalid port ":a.b.c.d" after host and addr
    hosts_test.go:129: tcp tcp:a.b.c.d/path address expected error Invalid bind address format: tcp:a.b.c.d/path return, got parse tcp://tcp:a.b.c.d/path: invalid port ":a.b.c.d" after host and addr
```

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Gbp-Pq: Name test--cli-fix-golang11.patch