qubes-anaconda-addon: drop --force-root option

It isn't needed anymore and will be dropped in the future.
Also use qvm-start directly, instead of (soon to be removed) qubes-netvm
service.

QubesOS/qubes-issues#2412

qubes-anaconda-addon/org_qubes_os_initial_setup/gui/spokes/qubes_os.py

@@ -531,7 +531,7 @@ class QubesOsSpoke(FirstbootOnlySpokeMixIn, NormalSpoke):
 
     def configure_default_template(self):
         self.set_stage('Setting default template')
-        self.run_command(['/usr/bin/qubes-prefs', '--force-root', 'default-template', self.default_template])
+        self.run_command(['/usr/bin/qubes-prefs', 'default-template', self.default_template])
 
     def configure_default_dvm(self):
         self.set_stage("Creating default DisposableVM")
@@ -548,11 +548,11 @@ class QubesOsSpoke(FirstbootOnlySpokeMixIn, NormalSpoke):
         if self.choice_whonix_default.get_selected():
             default_netvm = 'sys-whonix'
 
-        self.run_command(['/usr/bin/qvm-prefs', '--force-root', 'sys-firewall', 'netvm', 'sys-net'])
-        self.run_command(['/usr/bin/qubes-prefs', '--force-root', 'default-netvm', default_netvm])
-        self.run_command(['/usr/bin/qubes-prefs', '--force-root', 'updatevm', default_netvm])
-        self.run_command(['/usr/bin/qubes-prefs', '--force-root', 'clockvm', 'sys-net'])
-        self.run_command(['/usr/sbin/service', 'qubes-netvm', 'start'])
+        self.run_command(['/usr/bin/qvm-prefs', 'sys-firewall', 'netvm', 'sys-net'])
+        self.run_command(['/usr/bin/qubes-prefs', 'default-netvm', default_netvm])
+        self.run_command(['/usr/bin/qubes-prefs', 'updatevm', default_netvm])
+        self.run_command(['/usr/bin/qubes-prefs', 'clockvm', 'sys-net'])
+        self.run_command(['/usr/bin/qvm-start', default_netvm])
 
     def configure_template(self, template, path):
         self.set_stage("Configuring TemplateVM {}".format(template))