do not convert string to float

a read method should not reply on the automatic conversion
of the return value from string to a number.

- transitional solution with generalConfig.lazy_numer_validation
+ changing slighly generalInit mechanism: for above feature
  generalConfig.init is not required to be called (i.e. when
  used on the client side)

Change-Id: Ibecce1a45669273c105932acdc0908de55bfd1b9
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/27516
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

test/test_properties.py

@@ -38,10 +38,10 @@ V_test_Property = [
     [Prop(StringType(), 'default', extname='extname', mandatory=False),
      dict(default='default', extname='extname', export=True, mandatory=False)
      ],
-    [Prop(IntRange(), '42', export=True, name='custom', mandatory=True),
+    [Prop(IntRange(), 42, export=True, name='custom', mandatory=True),
      dict(default=42, extname='_custom', export=True, mandatory=True),
      ],
-    [Prop(IntRange(), '42', export=True, name='name'),
+    [Prop(IntRange(), 42, export=True, name='name'),
      dict(default=42, extname='_name', export=True, mandatory=False)
      ],
     [Prop(IntRange(), 42, '_extname', mandatory=True),
@@ -85,12 +85,12 @@ def test_Property_basic():
         Property('')
     with pytest.raises(ValueError):
         Property('', 1)
-    Property('', IntRange(), '42', 'extname', False, False)
+    Property('', IntRange(), 42, 'extname', False, False)
 
 
 def test_Properties():
     class Cls(HasProperties):
-        aa = Property('', IntRange(0, 99), '42', export=True)
+        aa = Property('', IntRange(0, 99), 42, export=True)
         bb = Property('', IntRange(), 0, export=False)
 
     assert Cls.aa.default == 42