chore: Fix int - str comparison error in ios desired capabilities (appium#517)

if number >= PytestXdistWorker.COUNT:

TypeError: '>=' not supported between instances of 'int' and 'str'

2. Updated test case path and iPhone model in Readme file

Author: Akulavenkatesh

README.md

@@ -92,18 +92,18 @@ $ pytest -n 2 test/unit
 ### Functional
 
 ```
-$ pytest test/functional/ios/find_by_ios_class_chain_tests.py
+$ pytest test/functional/ios/search_context/find_by_ios_class_chain_tests.py
 ```
 
 ### In parallel for iOS
-1. Create simulators named 'iPhone 6s - 8100' and 'iPhone 6s - 8101'
+1. Create simulators named 'iPhone 8 - 8100' and 'iPhone 8 - 8101'
 2. Install test libraries via pip
     ```
     $ pip install pytest pytest-xdist
     ```
 3. Run tests
     ```
-    $ pytest -n 2 test/functional/ios/find_by_ios_class_chain_tests.py
+    $ pytest -n 2 test/functional/ios/search_context/find_by_ios_class_chain_tests.py
     ```
 
 # Release

test/functional/ios/helper/desired_capabilities.py

@@ -50,7 +50,7 @@ def gw(number):
         if PytestXdistWorker.COUNT is None:
             return '0'
 
-        if number >= PytestXdistWorker.COUNT:
+        if number >= int(PytestXdistWorker.COUNT):
             return 'gw0'
 
         return 'gw{}'.format(number)
@@ -65,7 +65,7 @@ def wda_port():
     return 8100
 
 
-# Before running tests, you must have iOS simulators named 'iPhone 6s - 8100' and 'iPhone 6s - 8101'
+# Before running tests, you must have iOS simulators named 'iPhone 8 - 8100' and 'iPhone 8 - 8101'
 
 
 def iphone_device_name(port=None):