feat(report): display EOL information to scan summary (#1120)

* feat(report): display EOL information to scan summary

* detect Amazon linux EOL

util/util_test.go

@@ -154,3 +154,29 @@ func TestTruncate(t *testing.T) {
 		}
 	}
 }
+
+func Test_major(t *testing.T) {
+	var tests = []struct {
+		in       string
+		expected string
+	}{
+		{
+			in:       "",
+			expected: "",
+		},
+		{
+			in:       "4.1",
+			expected: "4",
+		},
+		{
+			in:       "0:4.1",
+			expected: "4",
+		},
+	}
+	for i, tt := range tests {
+		a := Major(tt.in)
+		if tt.expected != a {
+			t.Errorf("[%d]\nexpected: %s\n  actual: %s\n", i, tt.expected, a)
+		}
+	}
+}