Enabling the --json-output flag as a global option

The --json-output flag can be enabled for every swupd command.

This commit converts it to be a global flag, and enables it in every
swupd command.

Closes #869

Signed-off-by: Castulo Martinez <castulo.martinez@intel.com>

test/functional/bundleremove/remove-json.bats

@@ -0,0 +1,36 @@
+#!/usr/bin/env bats
+
+# Author: Castulo Martinez
+# Email: castulo.martinez@intel.com
+
+load "../testlib"
+
+test_setup() {
+
+	create_test_environment "$TEST_NAME"
+	create_bundle -L -n test-bundle -f /file_1 "$TEST_NAME"
+
+}
+
+@test "REM020: Removing a bundle using machine readable output" {
+
+	# the --json-output flag can be used so all the output of the bundle-remove
+	# command is created as a JSON stream that can be read and parsed by other
+	# applications interested into knowing real time status of the command
+
+	run sudo sh -c "$SWUPD bundle-remove --json-output $SWUPD_OPTS test-bundle"
+
+	assert_status_is 0
+	expected_output=$(cat <<-EOM
+		[
+		{ "type" : "start", "section" : "bundle-remove" },
+		{ "type" : "info", "msg" : "Deleting bundle files... " },
+		{ "type" : "info", "msg" : "Total deleted files: 2 " },
+		{ "type" : "info", "msg" : "Successfully removed 1 bundle " },
+		{ "type" : "end", "section" : "bundle-remove", "status" : 0 }
+		]
+	EOM
+	)
+	assert_is_output "$expected_output"
+
+}