Remove some heat-cfnclients only exceptions

Remove some exceptions that were written specifically for
heat-cfnclients and are unlikely to be referenced anywhere
else in the future.

Change-Id: I834138a833042449293f7b96a6c5bcfba8424d73
update neutronclient to 2.3.0 minimum version

Change-Id: I01a6899c43ae6ff63794267d2dd4ab32f06fa643
Adding VPN Service to Heat resources

Adds Neutron VPN service component to resources
supported by Heat with unit tests.

Change-Id: I3a626166253bcb33d8875cf406b293688f53ffa3
Implements: blueprint vpnaas-support
Adding IKE policy to Heat resources

Adds Neutron IKE policy component to resources
supported by Heat with unit tests.

Change-Id: I54a83aededc779ddcf44ce72b0a1bb2b69a26094
Implements: blueprint vpnaas-support
Adding IPsec policy to Heat resources

Adds Neutron IPsec policy component to resources
supported by Heat with unit tests.

Change-Id: I5014c50d51afe6a3a9b62cf3e88cbd6f7f60a62e
Implements: blueprint vpnaas-support
Adding IPsec site connection to Heat resources

Adds Neutron IPsec site connection component to resources
supported by Heat with unit tests.

Change-Id: Idf3c92b9a7ac513e7f7ab0d2501668405189ebc6
Implements: blueprint vpnaas-support
parallelize StackResource delete

This is fourth and last  patch in the series to implement
parallel delete. In this patch, parallelizing StackResource
deletion.

Blueprint parallel-delete

Change-Id: I49fb4ad64dd4245b61fad28a401174b11f2b8272
Merge "Remove some heat-cfnclients only exceptions"
Merge "update neutronclient to 2.3.0 minimum version"
Merge "Adding VPN Service to Heat resources"
Merge "Adding IKE policy to Heat resources"
Merge "Adding IPsec policy to Heat resources"
Merge "Adding IPsec site connection to Heat resources"
Merge "parallelize StackResource delete"