Skip python tests using -pR

tests/bugfixes/github/test_CVE_2018_9145.py

@@ -1,8 +1,9 @@
 # -*- coding: utf-8 -*-
 
 import system_tests
+import unittest
 
-
+@unittest.skip("Skipping test using option -pR (only for Debug mode)")
 class SubBoxLengthDataBufAbort(metaclass=system_tests.CaseMeta):
 
     url = "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-9145"

tests/bugfixes/github/test_issue_216.py

@@ -1,8 +1,9 @@
 # -*- coding: utf-8 -*-
 
 import system_tests
+import unittest
 
-
+@unittest.skip("Skipping test using option -pR (only for Debug mode)")
 class UncontrolledRecursion(metaclass=system_tests.CaseMeta):
     url = "https://github.com/Exiv2/exiv2/issues/216"
 

tests/bugfixes/github/test_issue_511.py

@@ -1,8 +1,9 @@
 # -*- coding: utf-8 -*-
 
 import system_tests
+import unittest
 
-
+@unittest.skip("Skipping test using option -pR (only for Debug mode)")
 class ThrowsWhenIFDsAreMalformed(metaclass=system_tests.CaseMeta):
     url = "https://github.com/Exiv2/exiv2/issues/511"
 

tests/bugfixes/redmine/test_issue_1108.py

@@ -1,7 +1,9 @@
 # -*- coding: utf-8 -*-
 
 import system_tests
+import unittest
 
+@unittest.skip("Skipping test using option -pR (only for Debug mode)")
 class CheckDumpSubFiles(metaclass=system_tests.CaseMeta):
 
     url = "http://dev.exiv2.org/issues/1108"