TT#70901 selenium: choose call forwarding date more carefully

Previously when adding condition (date is) to a call forwarding, it was
hardcoded to be the 15th of every month. However this caused tests to fail
on this exact day every month. Now beeing more careful with date choosing.

Change-Id: I3e49f02230d5e6390f484e7d3864747c3437ecdf

t/selenium/testrun.py

@@ -196,17 +196,22 @@ class testrun(unittest.TestCase):
             "Second condition was not deleted")
         print("OK")
         print("Try to add second condition 'date is...'...", end="")
+        day = datetime.today().day
+        if day >= 28:
+            day -= 1
+        elif day < 28:
+            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(., 15)]').click()
+        driver.find_element_by_xpath('/html/body//div/button[contains(., ' + str(day) + ')]').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(
-            len(driver.find_elements_by_xpath('//*[@id="csc-wrapper-call-forwarding"]//div/span[contains(., "' + datetime.today().strftime('%Y/%m') + '/15' + '")]')) > 0,
+            len(driver.find_elements_by_xpath('//*[@id="csc-wrapper-call-forwarding"]//div/span[contains(., "' + datetime.today().strftime('%Y/%m/') + str(day) + '")]')) > 0,
             "'Office hours are...' condition is not correct")
         print("OK")
         print("Try to delete second condition...", end="")
-        driver.find_element_by_xpath('//*[@id="csc-wrapper-call-forwarding"]//div/span[contains(., "' + datetime.today().strftime('%Y/%m') + '/15' + '")]').click()
+        driver.find_element_by_xpath('//*[@id="csc-wrapper-call-forwarding"]//div/span[contains(., "' + datetime.today().strftime('%Y/%m/') + str(day) + '")]').click()
         driver.find_element_by_xpath('/html/body//div//button[contains(., "Delete")]').click()
         wait_for_invisibility(driver, '//*[@id="csc-wrapper-call-forwarding"]/div/div[2]/div[4]/svg')
         self.assertTrue(