Fix missing git/hg handling in tests for py27

Author: mgorny

testing/test_file_finder.py

@@ -11,7 +11,7 @@ def inwd(request, wd, monkeypatch):
     if request.param == "git":
         try:
             wd("git init")
-        except FileNotFoundError:
+        except OSError:
             pytest.skip("git executable not found")
         wd("git config user.email [email protected]")
         wd('git config user.name "a test"')
@@ -20,7 +20,7 @@ def inwd(request, wd, monkeypatch):
     elif request.param == "hg":
         try:
             wd("hg init")
-        except FileNotFoundError:
+        except OSError:
             pytest.skip("hg executable not found")
         wd.add_command = "hg add ."
         wd.commit_command = 'hg commit -m test-{reason} -u test -d "0 0"'

testing/test_integration.py

@@ -9,7 +9,7 @@
 def wd(wd):
     try:
         wd("git init")
-    except FileNotFoundError:
+    except OSError:
         pytest.skip("git executable not found")
 
     wd("git config user.email [email protected]")

testing/test_regressions.py

@@ -29,7 +29,7 @@ def test_pkginfo_noscmroot(tmpdir, monkeypatch):
 
     try:
         do("git init", p.dirpath())
-    except FileNotFoundError:
+    except OSError:
         pass
     else:
         res = do((sys.executable, "setup.py", "--version"), p)