Set exec permissions to opennaas bin folder content.

Fixes issue
http://jira.i2cat.net/browse/OPENNAAS-1132
Rename user given NetworkConnection id field to name.
Add NetworkConnection new id field. This will store internal id of the NetworkConnection.
Generate SDNNetworkOFFlow route connection ids and use them correctly in OFProvisioningNetworkCapability and its driver.

allocateOFFlow generates the ids before calling the action in the driver.

The driver uses the connection id when creating flows in each switch in the route.
Add allocated flow to the sdnnetwork model in allocateOFFlow method in OFProvisioningNetworkCapability.
Avoid using ResourceManager to get the resource a capability belongs to.

Capabilities already have a reference to the resource they belong to.
Using this reference helps keeping the code clean :)
Implement removeOpenflowForwardingRule method, calling REMOVEOFFORWARDINGRULE action.
Process action execution exceptions in executeAction method.
Refresh model with real flows after creating and removing a flow, and before returning all flows.

TODO: Implementation of the refreshModelFlows method.
Implement refreshModelFlows method in OpenflowForwardingCapability.
Add author
Merge pull request #694 from isartcanyameres/fix/executable-bins

Set exec permissions to opennaas bin folder content.
Merge pull request #695 from isartcanyameres/fix/sdn-net-model-ids

Fix/sdn net model ids
Don't populate the model in createOFForwardingAction. The capability takes care of populating it using another action.
Assert messages for createOpenflowForwardingRuleTest.
Mockup GetFlowsAction to make tests fail in a comprehensive way.
Merge pull request #696 from isartcanyameres/fix/sdn-net-ids

Fix/sdn net ids
Merge pull request #697 from isartcanyameres/feature/removeOFfwdRule

Feature/remove offwd rule
Move getSwitchIdFromSession to abstract FloodlightAction.
Merge pull request #700 from isartcanyameres/feature/removeOFfwdRule

Move getSwitchIdFromSession to abstract FloodlightAction.