FEM: bare Python exceptions, fix the Import ones

src/Mod/Fem/femsolver/fenics/fenics_tools.py

@@ -30,7 +30,7 @@ import FreeCAD
 
 try:
     import fenics
-except:
+except ImportError:
     FreeCAD.Console.PrintError("No Fenics modules found, please install them.")
 else:
     import numpy as np

src/Mod/Fem/femtest/testcommon.py

@@ -105,7 +105,7 @@ class TestFemCommon(unittest.TestCase):
             fcc_print('Try importing {0} ...'.format(mod))
             try:
                 im = __import__('{0}'.format(mod))
-            except:
+            except ImportError:
                 im = False
             if not im:
                 # to get an error message what was going wrong