Relax check for WFMSubAgent to prevent only chroot for non scr agent

Reason is that WFMComponent use WFMSubAgent also for local namespace
that provide only SystemAgent. So original idea that SubAgent is used
only for scr is not valid.

wfm/src/WFMSubAgent.cc

@@ -33,10 +33,11 @@ WFMSubAgent::WFMSubAgent (const string& name, int handle)
 {
     // TODO when perl-bootloader die, remove whole system namespacing
     // check if name is scr ( can be prepended by chroot like "chroot=/mnt:scr" )
-    if (name.find("scr") == string::npos)
+    if (name.find("scr") == string::npos && name.find("chroot") != string::npos)
     {
-      y2internal("WFMSubAgent support only scr component, but not '%s'.", name);
-      abort;
+      y2internal("WFMSubAgent support chrrot only for scr component, but not '%s'.",
+        name.c_str());
+      abort();
     }
 }