Remove unused exceptions from cinder/exception.py

Remove unused exceptions from cinder/exception.py

find cinder/ -type f -name "*pyc" -exec rm {} \;
exceptions=`cat cinder/exception.py| grep -E '^class' |\
 awk {'print $2'} | awk -F '(' {'print $1'}`
for exc in $exceptions
do
    i=`find cinder/ -type f -exec grep -R $exc {} \; |wc -l`
    if [ $i -eq 1 ]
    then
        echo $exc
    fi
done

First removed exceptions:

DecryptionFailure
ImagePaginationFailed
VirtualInterfaceCreateException
VirtualInterfaceMacAddressException
MelangeConnectionFailed
VolumeUnattached
InvalidKeypair
InvalidSignature
InvalidInstanceType
InvalidIpProtocol
InvalidCidr
InvalidAggregateAction
InvalidGroup
InstanceInvalidState
InstanceNotRunning
InstanceNotSuspended
InstanceNotInRescueMode
InstanceSuspendFailure
InstanceResumeFailure
InstanceRebootFailure
InstanceTerminationFailure
VolumeServiceUnavailable
UnableToMigrateToSelf
DestinationHostUnavailable
SourceHostUnavailable
InvalidHypervisorType
DestinationHypervisorTooOld
DestinationDiskExists
InvalidDevicePath
DeviceIsBusy
InvalidCPUInfo
InvalidIpAddressError
InvalidVLANTag
InvalidVLANPortGroup
InvalidDiskFormat
InstanceUnacceptable
FlagNotSet
NoVolumeTypesFound
VolumeDriverNotFound
ListingImageRefsNotSupported
KernelNotFoundForImage
ProjectNotFound
ProjectMembershipNotFound
UserRoleNotFound
StorageRepositoryNotFound
DatastoreNotFound
FixedIpNotFoundForAddress
FixedIpNotFoundForInstance
FixedIpNotFoundForNetworkHost
FixedIpNotFoundForSpecificInstance
FixedIpNotFoundForHost
FixedIpAlreadyInUse
FixedIpInvalid
NoMoreFixedIps
NoFixedIpsDefined
FloatingIpDNSExists
FloatingIpNotFoundForAddress
FloatingIpNotFoundForHost
NoMoreFloatingIps
FloatingIpAssociated
FloatingIpNotAssociated
NoFloatingIpsDefined
NoFloatingIpInterface
KeypairNotFound
CertificateNotFound
AuthTokenNotFound
AccessKeyNotFound
SecurityGroupNotFoundForProject
SecurityGroupNotFoundForRule
SecurityGroupExistsForInstance
SecurityGroupNotExistsForInstance
NoInstanceTypesFound
InstanceTypeNotFoundByName
FlavorNotFound
CellNotFound
SchedulerHostFilterNotFound
SchedulerCostFunctionNotFound
SchedulerWeightFlagNotFound
InstanceMetadataNotFound
InstanceTypeExtraSpecsNotFound
LDAPUserNotFound
LDAPGroupNotFound
LDAPGroupMembershipNotFound
NoFilesFound
SwitchNotFoundForNetworkAdapter
NetworkAdapterNotFound
GlobalRoleNotAllowed
ImageRotationNotAllowed
RotationRequiredForBackup
LDAPUserExists
LDAPGroupExists
LDAPMembershipExists
ProjectExists
InstanceExists
InstanceTypeExists
InvalidSharedStorage
CannotResizeToSameSize
ImageTooLarge
ZoneRequestError
InstanceTypeMemoryTooSmall
InstanceTypeDiskTooSmall
InsufficientFreeMemory
CouldNotFetchMetrics
AggregateError
AggregateNotFound
AggregateNameExists
AggregateHostNotFound
AggregateMetadataNotFound
AggregateHostConflict
AggregateHostExists
InstanceTypeCreateFailed
SolidFireAPIStatusException
DuplicateVlan
InvalidInstanceIDMalformed
CouldNotFetchImage

Search again, Second removed exceptions:

UserNotFound
FixedIpNotFoundForNetwork
FloatingIpNotFound
SecurityGroupNotFound
InstanceTypeNotFound
LDAPObjectNotFound
UserExists

Search again, Third removed exceptions:

FixedIpNotFound

Change-Id: I028122c6132340b2fef2c144da787b7c4efddccf