manager: don't try to minimize transaction when using isolate

We should not avoid stopping services when using isolate, since that
kinda defeats the point of it.

http://bugzilla.redhat.com/show_bug.cgi?id=627014

fixme

@@ -80,14 +80,10 @@ v9:
 
 * kill-mode=cgroup muss auch die mainpid killen! https://bugzilla.redhat.com/show_bug.cgi?id=626477
 
-* o_ndelay ausschalten für stdin/stderr/stdout auf socket
-
 * follow LSB exit codes spec in "systemctl start"
 
 * oom_score_adj
 
-* fix isolate as runlevel  https://bugzilla.redhat.com/show_bug.cgi?id=627014
-
 * rename failed/maintenance https://bugzilla.redhat.com/show_bug.cgi?id=614619
 
 * systemctl wrapping https://bugzilla.redhat.com/show_bug.cgi?id=626891 https://bugzilla.redhat.com/show_bug.cgi?id=626443

src/manager.c

@@ -1226,7 +1226,8 @@ static int transaction_activate(Manager *m, JobMode mode, DBusError *e) {
         /* Second step: Try not to stop any running services if
          * we don't have to. Don't try to reverse running
          * jobs if we don't have to. */
-        transaction_minimize_impact(m);
+        if (mode != JOB_ISOLATE)
+                transaction_minimize_impact(m);
 
         /* Third step: Drop redundant jobs */
         transaction_drop_redundant(m);