CLOUDSTACK-6349: IAM - No error message presented to the user , when invalid password is provided.

- AccountManager now works using accountId instead of accountType
CLOUDSTACK-6349: IAM - No error message presented to the user , when
invalid password is provided.

- AccountManager now works using accountId instead of accountType in
following methods too:
- isResourceDomainAdmin()
- isAdmin()
CLOUDSTACK-6501:IAM - DomainAdmin - When listVirtualMachines is used
with listall=true and account and domainId , Vms owned by the account
account is not listed.
CLOUDSTACK-6502:IAMGroup.list and IAMPolicy.list in marvin base.py are
not working.
CLOUDSTACK-6512:IAM - Not able to list shared networks in the Vm
deployment flow. This commit is to revert
ec5ee761d98c67c7da2ea70b623d4a9f3da966b5 to still use old logic for
listNetworks to keep old behavior instead of new IAM model.
CLOUDSTACK-6513: IAM - Templates - When templates are listed with
templatefilter="shared" is used , we see public templates also being
included in the list. This commit reverts listTemplates behavior to 4.3
old logic without using consistent interpretation of list parameters
adopted in new IAM model.