pylint: Fix use-dict-literal

Pylint 2.10 introduced new checker use-dict-literal:
> Added use-dict-literal: Emitted when dict() is called with no
  arguments instead of using {}

https://pylint.pycqa.org/en/latest/whatsnew/changelog.html#what-s-new-in-pylint-2-10-0
pylint-dev/pylint#4365

Fixes: freeipa#244
Signed-off-by: Stanislav Levin <slev@altlinux.org>

src/ipahealthcheck/core/plugin.py

@@ -41,7 +41,7 @@ class some_plugin(...):
     def __init__(self):
         self.plugins = []
         self.framework = None
-        self.config = dict()
+        self.config = {}
         self.options = None
 
     def initialize(self, framework, config, options=None):

src/ipahealthcheck/ipa/idns.py

@@ -60,9 +60,9 @@ def check(self):
         base_records = system_records.get_base_records()
 
         # collect the list of expected values
-        txt_rec = dict()
-        srv_rec = dict()
-        uri_rec = dict()
+        txt_rec = {}
+        srv_rec = {}
+        uri_rec = {}
         a_rec = list()
         aaaa_rec = list()
 

src/ipahealthcheck/ipa/trust.py

@@ -48,7 +48,7 @@ def get_trust_domains():
         for cn in trust.get('cn'):
             trustdomains = api.Command.trustdomain_find(cn, raw=True)
             for trustdomain in trustdomains['result']:
-                domain = dict()
+                domain = {}
                 domain['domain'] = trustdomain.get('cn')[0]
                 domain['domainsid'] = trustdomain.get(
                     'ipanttrusteddomainsid')[0]

tests/util.py

@@ -88,7 +88,7 @@ def __init__(self, attr_name=None, name=None, component_services=None):
         pass
 
     def status(self, api_instance, server=None, attrs_list=("*",)):
-        return [dict()]
+        return [{}]
 
 
 class ADtrustBasedRole(ServiceBasedRole):