Complete implementation of OVA handling

Add functions for uploading, listing, and removing OVA images to the API
and CLI interfaces. Includes improved parsing of the OVF and creation of
a system_template and profile for each OVA.

Also modifies some behaviour around profiles, making most components
option at creation to support both profile types (and incomplete
profiles generally).

Implementation part 2/3 - remaining: OVA VM creation

References #71

api-daemon/pvcapid/ova-tmp.py

@@ -0,0 +1,46 @@
+
+#
+# TEMP
+#
+def tempstuff():
+    # Verify that the cluster has enough space to store all OVA disk volumes
+    total_size_bytes = 0
+    for disk in disk_map:
+        # Normalize the dev size to MB
+        # The function always return XXXXB, so strip off the B and convert to an integer
+        dev_size_bytes = int(pvc_ceph.format_bytes_fromhuman(disk.get('capacity', 0))[:-1])
+        ova_size_bytes = int(pvc_ceph.format_bytes_fromhuman(ova_size)[:-1])
+        # Get the actual image size
+        total_size_bytes += dev_size_bytes
+        # Add on the OVA size to account for the VMDK
+        total_size_bytes += ova_size_bytes
+
+    zk_conn = pvc_common.startZKConnection(config['coordinators'])
+    pool_information = pvc_ceph.getPoolInformation(zk_conn, pool)
+    pvc_common.stopZKConnection(zk_conn)
+    pool_free_space_bytes = int(pool_information['stats']['free_bytes'])
+    if total_size_bytes >= pool_free_space_bytes:
+        output = {
+            'message': "ERROR: The cluster does not have enough free space ({}) to store the VM ({}).".format(
+                pvc_ceph.format_bytes_tohuman(pool_free_space_bytes),
+                pvc_ceph.format_bytes_tohuman(total_size_bytes)
+            )
+        }
+        retcode = 400
+        cleanup_ova_maps_and_volumes()
+        return output, retcode
+
+        # Convert from the temporary to destination format on the blockdevs
+        retcode, stdout, stderr = pvc_common.run_os_command(
+            'qemu-img convert -C -f {} -O raw {} {}'.format(img_type, temp_blockdev, dest_blockdev)
+        )
+        if retcode:
+            output = {
+                'message': "ERROR: Failed to convert image '{}' format from '{}' to 'raw': {}".format(disk.get('src'), img_type, stderr)
+            }
+            retcode = 400
+            cleanup_img_maps_and_volumes()
+            cleanup_ova_maps_and_volumes()
+            return output, retcode
+
+