Fix certmonger errors when doing a client or server uninstall.

This started with the client uninstaller returning a 1 when not installed.
There was no way to tell whether the uninstall failed or the client
simply wasn't installed which caused no end of grief with the installer.

This led to a lot of certmonger failures too, either trying to stop
tracking a non-existent cert or not handling an existing tracked
certificate.

I moved the certmonger code out of the installer and put it into the
client/server shared ipapython lib. It now tries a lot harder and smarter
to untrack a certificate.

ticket 142

ipa-client/ipa-install/ipa-client-install

@@ -34,6 +34,7 @@ try:
     from ipapython.ipautil import run, user_input, CalledProcessError, file_exists
     from ipapython import sysrestore
     from ipapython import version
+    from ipapython import certmonger
     import SSSDConfig
     from ConfigParser import RawConfigParser
 except ImportError:
@@ -174,7 +175,7 @@ def uninstall(options):
 
     if not fstore.has_files() and not options.force:
         print "IPA client is not configured on this system."
-        return 1
+        return 2
 
     # Remove our host cert and CA cert
     if nickname_exists("IPA CA"):
@@ -183,19 +184,25 @@ def uninstall(options):
         except Exception, e:
             print "Failed to remove IPA CA from /etc/pki/nssdb: %s" % str(e)
     if nickname_exists("Server-Cert"):
+        # Always start certmonger. We can't untrack something if it isn't
+        # running
+        try:
+            service('certmonger', 'start')
+        except:
+            pass
+        try:
+            certmonger.stop_tracking('/etc/pki/nssdb', nickname='Server-Cert')
+        except (CalledProcessError, RuntimeError), e:
+            logging.error("certmonger failed to stop tracking certificate: %s" % str(e))
         try:
             run(["/usr/bin/certutil", "-D", "-d", "/etc/pki/nssdb", "-n", "Server-Cert"])
         except Exception, e:
             print "Failed to remove Server-Cert from /etc/pki/nssdb: %s" % str(e)
-        try:
-            run(["/usr/bin/ipa-getcert", "stop-tracking", "-d", "/etc/pki/nssdb", "-n", "Server-Cert"])
-        except Exception, e:
-            print "Failed to stop tracking Server-Cert in certmonger: %s" % str(e)
 
     try:
         service('certmonger', 'stop')
     except:
-        print "Failed to stop the certmonger daemon"
+        pass
 
     try:
         chkconfig('certmonger', 'off')