Make possiblity to disable cached checked tests

Fixed a few pyling warning about text formatting

PRODX-38928

Change-Id: Idd44d481fc3ff45737fc73506e90b3aca88b16cd
diff --git a/testrail_bot/control/models.py b/testrail_bot/control/models.py
index a68d088..71fd861 100644
--- a/testrail_bot/control/models.py
+++ b/testrail_bot/control/models.py
@@ -1,5 +1,3 @@
-import datetime
-
 from django.core.files.storage import FileSystemStorage
 from django.db import models
 from django.utils.timezone import now
@@ -39,6 +37,7 @@
     test_pattern = models.CharField(max_length=300, blank=True)
     run_id = models.CharField(max_length=300)
     checked_tests = IntegerListField(default=list())
+    caching_tests_enabled = models.BooleanField(default=False)
     created_by_id = models.IntegerField(default='109')
     filter_func = models.TextField(null=True, blank=True)
     ip_filter = models.BooleanField(default=True)
@@ -95,13 +94,13 @@
             ("11188", "[MCP2.0_XENA]Tempest"),
             ("11170", "[MCP2.0_YOGA]Tempest"),
             ("11192", "[MCP2.0_ANTELOPE]Tempest"))
-        ),
+         ),
         ("Stepler", (
             ("10886", "[MCP2.0_USSURI]Stepler"),
             ("10887", "[MCP2.0_VICTORIA]Stepler"),
             ("11171", "[MCP2.0_YOGA]Stepler"),
             ("11193", "[MCP2.0_ANTELOPE]Stepler"))
-        ),
+         ),
     ]
     suite_id = models.CharField(max_length=20, choices=SUITE_CHOICES)
     suite_name = models.CharField(max_length=100, blank=True)