get ec2config.yaml working after external tool refactoring

[Philip Durbin]

I merged IQSS/dataverse-ansible#112 and now I need to adjust ec2config.yaml to the new format.

TASK [dataverse : enable data curation tool] ***********************************
fatal: [localhost]: FAILED! => {"msg": "The conditional check 'dataverse.externaltools.datacurationtool.enabled == true' failed. The error was: error while evaluating conditional (dataverse.externaltools.datacurationtool.enabled == true): 'dict object' has no attribute 'externaltools'\n\nThe error appears to have been in '/home/centos/dataverse/tasks/dataverse-externaltools.yml': line 3, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: enable data curation tool\n ^ here\n"}