add ternary util

shared/utils/ternary/ternary.go

+package ternary
+
+// IfNotEmptyOr returns a if not empty, otherwise b
+func IfNotEmptyOr(a, b string) string {
+	if a != "" {
+		return a
+	}
+	return b
+}
+
+// If returns a if con is true, b otherwise
+func If(con bool, a, b interface{}) interface{} {
+	if con {
+		return a
+	}
+	return b
+}