Allow multiple configurations for AWSConfigurationService

AWS configuration can now specify an id  with: <extension target= "org.nuxeo.runtime.aws.AWSConfigurationService" point= "configuration" > <configuration id= "myconfig" > <accessKeyId>MY_ACCESS_KEY_ID</accessKeyId> <secretKey>MY_SECRET_KEY</secretKey> <region>MY_REGION</region> </configuration> </extension> If the id is not specified, default is used. To get to this configuration, one can then use: new NuxeoAWSCredentialsProvider(id) new NuxeoAWSRegionProvider(id).getRegion() Note that if the configuration is not found, the providers will still fall back on the default AWS SDK behavior to look in the OS environment, Java system properties, AWS profile or EC2 container credentials (which don't take into account any configuration id).