Remove Apache ccache on upgrade.

Make this removal a common function that can be shared between installer
and upgrade tool.

https://fedorahosted.org/freeipa/ticket/2395

install/tools/ipa-upgradeconfig

@@ -250,6 +250,10 @@ def main():
     upgrade_pki()
     update_dbmodules(krbctx.default_realm)
     uninstall_ipa_kpasswd()
+
+    http = httpinstance.HTTPInstance()
+    http.remove_httpd_ccache()
+
 try:
     if __name__ == "__main__":
         sys.exit(main())

ipaserver/install/httpinstance.py

@@ -84,6 +84,7 @@ class HTTPInstance(service.Service):
             self.step("setting up browser autoconfig", self.__setup_autoconfig)
         self.step("publish CA cert", self.__publish_ca_cert)
         self.step("creating a keytab for httpd", self.__create_http_keytab)
+        self.step("clean up any existing httpd ccache", self.remove_httpd_ccache)
         self.step("configuring SELinux for httpd", self.__selinux_config)
         self.step("restarting httpd", self.__start)
         self.step("configuring httpd to start on boot", self.__enable)
@@ -136,7 +137,9 @@ class HTTPInstance(service.Service):
         pent = pwd.getpwnam("apache")
         os.chown("/etc/httpd/conf/ipa.keytab", pent.pw_uid, pent.pw_gid)
 
+    def remove_httpd_ccache(self):
         # Clean up existing ccache
+        pent = pwd.getpwnam("apache")
         installutils.remove_file('/tmp/krb5cc_%d' % pent.pw_uid)
 
     def __configure_http(self):