adding args to be added in helmfile along with context to be set in helmspec (#171)

Ref #114 

Changelog:

* adding args to be added in helmfile along with context to be set in helmspec

* making command args take precedence

state/state.go

@@ -25,6 +25,7 @@ import (
 // HelmState structure for the helmfile
 type HelmState struct {
 	BaseChartPath      string
+	HelmDefaults       HelmSpec         `yaml:"helmDefaults"`
 	Context            string           `yaml:"context"`
 	DeprecatedReleases []ReleaseSpec    `yaml:"charts"`
 	Namespace          string           `yaml:"namespace"`
@@ -32,6 +33,11 @@ type HelmState struct {
 	Releases           []ReleaseSpec    `yaml:"releases"`
 }
 
+// HelmSpec to defines helmDefault values
+type HelmSpec struct {
+	Args []string `yaml:"args"`
+}
+
 // RepositorySpec that defines values for a helm repo
 type RepositorySpec struct {
 	Name     string `yaml:"name"`