Move oslotest to test only requirements

oslotest is only used for unit testing, so
it shouldn't be in requirements.txt

Change-Id: I5073fbd93712072cec8598663590e35fc2edd08d
VMware: virt rescue method now supports objects

Commit a37a96fd13b933123e80ad24e37fc37d73c16059 ensured
that the compute API and manager are now getting objects
for the rescue method.

This patch adds support to the virt driver code.

Change-Id: Id7fca437f8470ee483ec3683211766095b293ebf
VMware: virt unrescue method now supports objects

Commit 65ad230af5ece020822fa963dd30fd641a54ae91 ensured
that the compute API and manager are now getting objects
for the unrescue method.

This patch adds support to the virt driver code.

Change-Id: I42fa532d5b2b1c92121216ac31b56a7b595d59e7
VM diagnostics: add methods to class to update diagnotics

Add the following methods:
    - add_cpu
    - add_nic
    - add_disk

The methods will enable the virt driver to update the object.

Change-Id: Id4ca1f188dc955590cd32c634d9c33572f93a5ef
VM diagnostics: add serializer to Diagnostics object

The serializer will enable the API to return a dictionary to the
user.

Part of the blueprint v3-diagnostics

Change-Id: If86a94cba98745acbc9976fa7354c98ec6716ac0
libvirt: speed up list_instances method

Switch the list_instances method to use the new
list_instance_domains method. This removes the last
user of list_instance_ids, so delete that method.

Blueprint: libvirt-domain-listing-speedup
Change-Id: I101c42799589f01a830d974e48a1fd4b9fc60371
libvirt: speed up get_all_block_devices method

Switch the get_all_block_devices method to use the new
list_instance_domains method.

Blueprint: libvirt-domain-listing-speedup
Change-Id: I8d3fdcbbe5539370583ace6abaffa62fec457d7b
Merge "Move oslotest to test only requirements"
Merge "libvirt: speed up list_instances method"
Merge "VM diagnostics: add methods to class to update diagnotics"
Merge "VM diagnostics: add serializer to Diagnostics object"
Merge "VMware: virt unrescue method now supports objects"
Merge "VMware: virt rescue method now supports objects"
Merge "libvirt: speed up get_all_block_devices method"