Changes in vimconn_vmware.py :

1.Added logger and modified existing logging statements
2.Improved exception handling
3.Added global keys for flavor dictionary
4.Derived organization name by splitting tenant name into tenant name and organization name
5.Added logic to identify catalog by hashing

Change-Id: I4559f5d44fc7cd5924f721aa7f39e4d5d299ef19
Signed-off-by: kate <akate@vmware.com>