feat(scan): support dnf modules (#1114)

* feat(scan): support dnf modules

* change dnf module list --installed to --enabled

* chore: refactor

* feat(report): detect logic for dnf modularity label

* fix func name

* chore: update go mods

scan/redhatbase_test.go

@@ -397,3 +397,44 @@ func TestParseNeedsRestarting(t *testing.T) {
 		}
 	}
 }
+
+func Test_redhatBase_parseDnfModuleList(t *testing.T) {
+	type args struct {
+		stdout string
+	}
+	tests := []struct {
+		name       string
+		args       args
+		wantLabels []string
+		wantErr    bool
+	}{
+		{
+			name: "Success",
+			args: args{
+				stdout: `Red Hat Enterprise Linux 8 for x86_64 - AppStream from RHUI (RPMs)
+Name                                     Stream                                         Profiles                                          Summary
+virt                 rhel [d][e] common [d]                               Virtualization module
+nginx                                    1.14 [d][e]                                    common [d] [i]                                    nginx webserver
+
+Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled`,
+			},
+			wantLabels: []string{
+				"nginx:1.14",
+			},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			o := &redhatBase{}
+			gotLabels, err := o.parseDnfModuleList(tt.args.stdout)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("redhatBase.parseDnfModuleList() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(gotLabels, tt.wantLabels) {
+				t.Errorf("redhatBase.parseDnfModuleList() = %v, want %v", gotLabels, tt.wantLabels)
+			}
+		})
+	}
+}