started refactoring of node collection db calls
fixed tests. need to refactor network db calls
fix for flake8
tests for node collection handler
remove debug comments
consistently exclude boot volume in disks API
eagerloading for node collection handler.
GET api/nodes takes about 2 sec
fix tests
fix flake8
revert flake8 back, diff versions of flake
Merge pull request #1596 from Mirantis/prd1841-boot-volume

consistently exclude boot volume in disks API
Merge pull request #1581 from Mirantis/fix/node_collection_perfomance

refactoring of node collection db calls
Fix admin network selection
We iterate over networks, if network has ip
which includes in admin network then we return
this interface.
Fix warning message
fix flake
Refactor network manager:
* working with object instead of object id and making overhead sql requests
* use admin_interfacs instead of main_nic
fix flake
Merge pull request #1601 from Mirantis/fix-admin-interface-selection

Fix admin interface selection [PRD-1748]
Remove mount point from cephjournal volume definition
rearrange Ceph storage options in OpenStack settings and setup wizard

On CentOS and Ubuntu, present a list of checkboxes to enable LVM and/or
Ceph for volumes, Ceph for images, and Swift and/or Ceph for objects,
with all checkboxes off by default. On RHOS, Ceph options are disabled
in the wizard and absent from the settings tab.