Rundeck Ec2 Nodes Plugin Versions Save

Updates logging to slf4j. Fixes some issues with dependencies.

• Fix https://github.com/rundeck-plugins/rundeck-ec2-nodes-plugin/issues/98
• https://github.com/rundeck-plugins/rundeck-ec2-nodes-plugin/pull/99

• https://github.com/rundeck-plugins/rundeck-ec2-nodes-plugin/pull/94 - get all node responses via paging

• Support multiple values in aws filter: #80
  • use "FilterName=Value1,Value2;FilterName2=Value1,Value2" etc
• Fixed #56 missing clientConfiguration from STS api call

• Fix #67 Update aws-sdk to 1.11.148

• Fix #61 add synchronousLoad to disable asynchronous behavior