TT#70901 selenium: prevent date selection from choosing year instead of date

When day = 20 for example, it selects the year 20xx instead of the 20. of the
month, due to only checking if button contains number 20. Specifying XPATH
more clearly and dropping contains check to prevent this

Change-Id: I597e181ad2d88e40dfa0efc27dd29bacea7722eb

t/selenium/testrun.py

@@ -205,7 +205,7 @@ class testrun(unittest.TestCase):
             day += 1
         driver.find_element_by_xpath('//*[@id="csc-wrapper-call-forwarding"]//div/span[contains(., "condition")]').click()
         driver.find_element_by_xpath('/html/body/div[3]/div/div[2]/div/div[3]/div[3]').click()
-        driver.find_element_by_xpath('/html/body//div/button[contains(., ' + str(day) + ')]').click()
+        driver.find_element_by_xpath('/html/body//div[@class="q-date__calendar-days fit"]/div[' + str(day) + ']/button').click()
         driver.find_element_by_xpath('/html/body//div//button[contains(., "Save")]').click()
         wait_for_invisibility(driver, '//*[@id="csc-wrapper-call-forwarding"]/div/div[2]/div[4]/svg')
         self.assertTrue(