Increase length of 'name' column in package table

Cherry-picked from master

When using mysql, we need to make sure that the
name column is long enough to accomodate the
package name.

'io.murano.lib.networks.Neutron' is more than
20 chars.  Modify the schema to make it 80 chars

Change-Id: I6f7154141ad4b728d98f436b2eaa839239ee302a
Closes-Bug: #1314389