Fixing violations of E722 for flake8 checks

This change fixes violations of E722, the use of except without
specifying an exception type. For now the high-level Exception
class is used as a generic catchall. In the future these cases
will be updated to handle the specific exceptions expected.

kmip/core/primitives.py

@@ -678,7 +678,7 @@ class Boolean(Base):
         """
         try:
             value = unpack('!Q', istream.read(self.LENGTH))[0]
-        except:
+        except Exception:
             self.logger.error("Error reading boolean value from buffer")
             raise
 
@@ -713,7 +713,7 @@ class Boolean(Base):
         """
         try:
             ostream.write(pack('!Q', self.value))
-        except:
+        except Exception:
             self.logger.error("Error writing boolean value to buffer")
             raise