TestRunLinterRule flakiness is fixed

var linter = Linter{} was declared outside this test creating
a var with shared state

Signed-off-by: Alfonso Uceda <uceda73@gmail.com>

pkg/lint/support/message_test.go

@@ -21,7 +21,6 @@ import (
 	"testing"
 )
 
-var linter = Linter{}
 var errLint = errors.New("lint failed")
 
 func TestRunLinterRule(t *testing.T) {
@@ -45,6 +44,7 @@ func TestRunLinterRule(t *testing.T) {
 		{-1, errLint, 4, false, ErrorSev},
 	}
 
+	var linter = Linter{}
 	for _, test := range tests {
 		isValid := linter.RunLinterRule(test.Severity, "chart", test.LintError)
 		if len(linter.Messages) != test.ExpectedMessages {