Fixed references to missing method in ec2 modules

Change-Id: I9b89d433b545269d111b3c290b6411aabf58dd24
Merge pull request #6415 from devoncrouse/devel

Fixed references to missing method in ec2 modules
Bulk update of choices=BOOLEANS to type='bool'
Bulk update of choices=BOOLEANS to type='bool'
Bulk update of choices=BOOLEANS to type='bool'
Bulk update of choices=BOOLEANS to type='bool'
Bulk update of choices=BOOLEANS to type='bool'
Bulk update of choices=BOOLEANS to type='bool'
Bulk update of choices=BOOLEANS to type='bool'
Bulk update of choices=BOOLEANS to type='bool'
Merge pull request #6422 from risaacson/migrate_booleans_bool_ec2_vpc

Bulk update of choices=BOOLEANS to type='bool'
Merge pull request #6423 from risaacson/migrate_booleans_bool_gce

Bulk update of choices=BOOLEANS to type='bool'
Merge pull request #6424 from risaacson/migrate_booleans_bool_quantum_subnet

Bulk update of choices=BOOLEANS to type='bool'
Merge pull request #6425 from risaacson/migrate_booleans_bool_rax

Bulk update of choices=BOOLEANS to type='bool'
Merge pull request #6426 from risaacson/migrate_booleans_bool_rax_files

Bulk update of choices=BOOLEANS to type='bool'
Merge pull request #6427 from risaacson/migrate_booleans_bool_rax_files_objects

Bulk update of choices=BOOLEANS to type='bool'
Merge pull request #6428 from risaacson/migrate_booleans_bool_postgresql_user

Bulk update of choices=BOOLEANS to type='bool'
Merge pull request #6429 from risaacson/migrate_booleans_bool_django_manage

Bulk update of choices=BOOLEANS to type='bool'
Micro-optimization of inventory.expand_hosts.detect_range
Micro-optimization: replace s.find(x)!=-1 with x in s

timeit shows a speedup of ~3x on Python 2.7.5 x86_64.
It also makes the code a bit shorter.