Fix the acceptance tests after the merger of #279 (#443)

* Enable acceptance tests

* Fix the acceptance tests

* Move `--headless` from `getDefaultCommandArgs` to `getDefaultTapCommandArgs`

* Fix rest of the failing acceptance tests

* Revert "Enable acceptance tests"

This reverts commit 3f919e865a.

* Revert "Revert "Enable acceptance tests""

This reverts commit c0bfe54b70.

* Ignore `--headless` in `mizu view`

* Make all non-informative things informative

* Remove `github.com/stretchr/testify` dependency from the acceptance tests

* Move the helper methods `waitTimeout` and `checkDBHasEntries` from `tap_test.go` to `testsUtils.go`

* Split `checkDBHasEntries` method into `getDBEntries` and `assertEntriesAtLeast` methods

* Revert "Revert "Revert "Enable acceptance tests"""

This reverts commit c13342671c.

* Revert "Revert "Revert "Revert "Enable acceptance tests""""

This reverts commit 0f8c436926.

* Make `getDBEntries` and `checkEntriesAtLeast` methods return errors instead

* Revert "Revert "Revert "Revert "Revert "Enable acceptance tests"""""

This reverts commit 643fdde009.

cli/config/configStructs/tapConfig.go

@@ -3,9 +3,10 @@ package configStructs
 import (
 	"errors"
 	"fmt"
-	"github.com/up9inc/mizu/shared"
 	"regexp"
 
+	"github.com/up9inc/mizu/shared"
+
 	"github.com/up9inc/mizu/shared/units"
 )
 
@@ -22,6 +23,7 @@ const (
 	EnforcePolicyFile             = "traffic-validation-file"
 	ContractFile                  = "contract"
 	DaemonModeTapName             = "daemon"
+	HeadlessMode                  = "headless"
 )
 
 type TapConfig struct {
@@ -44,6 +46,7 @@ type TapConfig struct {
 	ApiServerResources     shared.Resources `yaml:"api-server-resources"`
 	TapperResources        shared.Resources `yaml:"tapper-resources"`
 	DaemonMode             bool             `yaml:"daemon" default:"false"`
+	HeadlessMode           bool             `yaml:"headless" default:"false"`
 }
 
 func (config *TapConfig) PodRegex() *regexp.Regexp {