Misused and not used config options

Cherry picks dc9c3cb from Nova.

Fixes bug #1000071

[nova.api.sizelimit.py]
osapi_max_request_body_size: BoolOpt -> IntOpt

[nova.rpc.__init__.py]
allowed_rpc_exception_modules: IntOpt -> ListOpt

[nova.volume.driver.py]
num_shell_tries: StrOpt -> IntOpt
num_iscsi_scan_tries: StrOpt -> IntOpt

[nova.volume.driver.py]
san_thin_provision: 'true' -> True
san_is_local: 'false' -> False

Change-Id: If283dd7c4feba69c07bd483acd14f45c2659b743

cinder/api/sizelimit.py

@@ -29,9 +29,9 @@ from cinder import wsgi
 
 
 #default request size is 112k
-max_request_body_size_opt = cfg.BoolOpt('osapi_max_request_body_size',
-        default=114688,
-        help='')
+max_request_body_size_opt = cfg.IntOpt('osapi_max_request_body_size',
+                                       default=114688,
+                                       help='')
 
 FLAGS = flags.FLAGS
 FLAGS.register_opt(max_request_body_size_opt)

cinder/rpc/__init__.py

@@ -34,7 +34,7 @@ rpc_opts = [
     cfg.IntOpt('rpc_response_timeout',
                default=60,
                help='Seconds to wait for a response from call or multicall'),
-    cfg.IntOpt('allowed_rpc_exception_modules',
+    cfg.ListOpt('allowed_rpc_exception_modules',
                default=['cinder.exception'],
                help='Modules of exceptions that are permitted to be recreated'
                     'upon receiving exception data from an rpc call.'),

cinder/volume/driver.py

@@ -36,10 +36,10 @@ volume_opts = [
     cfg.StrOpt('volume_group',
                default='cinder-volumes',
                help='Name for the VG that will contain exported volumes'),
-    cfg.StrOpt('num_shell_tries',
+    cfg.IntOpt('num_shell_tries',
                default=3,
                help='number of times to attempt to run flakey shell commands'),
-    cfg.StrOpt('num_iscsi_scan_tries',
+    cfg.IntOpt('num_iscsi_scan_tries',
                default=3,
                help='number of times to rescan iSCSI target to find volume'),
     cfg.IntOpt('iscsi_num_targets',

cinder/volume/san.py

@@ -45,7 +45,7 @@ LOG = logging.getLogger(__name__)
 
 san_opts = [
     cfg.BoolOpt('san_thin_provision',
-                default='true',
+                default=True,
                 help='Use thin provisioning for SAN volumes?'),
     cfg.StrOpt('san_ip',
                default='',
@@ -66,7 +66,7 @@ san_opts = [
                default=22,
                help='SSH port to use with SAN'),
     cfg.BoolOpt('san_is_local',
-                default='false',
+                default=False,
                 help='Execute commands locally instead of over SSH; '
                      'use if the volume service is running on the SAN device'),
     cfg.StrOpt('san_zfs_volume_base',