Set explicit confdir option for global contexts

Some API contexts are used to modify global state (e.g. files in /etc
and /var). These contexts do not support confdir overrides. Initialize
the API with an explicit confdir argument to paths.ETC_IPA.

The special contexts are:

* backup
* cli_installer
* installer
* ipctl
* renew
* restore
* server
* updates

The patch also corrects the context of the ipa-httpd-kdcproxy script to
'server'.

https://fedorahosted.org/freeipa/ticket/6389

Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>

daemons/dnssec/ipa-dnskeysync-replica

@@ -122,7 +122,10 @@ def ldap2replica_zone_keys_sync(log, ldapkeydb, localhsm):
 
 
 # IPA framework initialization
-ipalib.api.bootstrap(in_server=True, log=None)  # no logging to file
+ipalib.api.bootstrap(
+    context='dns', confdir=paths.ETC_IPA,
+    in_server=True, log=None,  # no logging to file
+)
 ipalib.api.finalize()
 standard_logging_setup(verbose=True, debug = True)  # debug=ipalib.api.env.debug)
 log = root_logger

daemons/dnssec/ipa-dnskeysyncd

@@ -19,7 +19,10 @@ from ipaplatform.paths import paths
 from ipaserver.dnssec.keysyncer import KeySyncer
 
 # IPA framework initialization
-api.bootstrap(in_server=True, log=None)  # no logging to file
+api.bootstrap(
+    context='dns', confdir=paths.ETC_IPA,
+    in_server=True, log=None,  # no logging to file
+)
 api.finalize()
 standard_logging_setup(verbose=True, debug=api.env.debug)
 log = root_logger

daemons/dnssec/ipa-ods-exporter

@@ -614,7 +614,10 @@ elif len(sys.argv) == 2:
     log.addHandler(console)
 
 # IPA framework initialization
-ipalib.api.bootstrap(in_server=True, log=None)  # no logging to file
+ipalib.api.bootstrap(
+    context='dns', confdir=paths.ETC_IPA,
+    in_server=True, log=None,  # no logging to file
+)
 ipalib.api.finalize()
 
 # Kerberos initialization