##### SUMMARY
The file contents that end up as the output of ecs_certificates "full_chain_path" are not a valid format for import into, for example, a PKCS12 store.

This is the result of the return value of the ECS API being an array, and not properly turning that array into concatenated certificates for the resulting PEM file.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
ecs_certificate

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
Applies to ansible 2.9.0.dev0

##### CONFIGURATION
N/A affects all configurations

##### OS / ENVIRONMENT
N/A affects all OS/environment


##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
Populate full_chain_path and inspect output

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
A properly formatted PEM certificate chain

##### ACTUAL RESULTS
A certificate chain in format ['CERT','CERT']

if not self.check(module) or self.force:
            body = {}
            
            if self.csr and os.path.exists(self.csr):
                with open(self.csr, 'r') as csr_file:
                    body['csr'] = csr_file.read()
            
            
            
            if self.request_type != 'new' and not self.tracking_id:
                module.warn('No existing Entrust certificate found in path={0} and no tracking_id was provided, setting request_type to "new" for this task'
                            'run. Future playbook runs that point to the pathination file in {1} will use request_type={2}'
                            .format(self.path, self.path, self.request_type))
                self.request_type = 'new'
            elif self.request_type == 'new' and self.tracking_id:
                module.warn('Existing certificate being acted upon, but request_type is "new", so will be a new certificate issuance rather than a'
                            'reissue or renew')
            
            
            body.update(self.convert_tracking_params(module))
            body.update(self.convert_cert_subject_params(module))
            body.update(self.convert_general_params(module))
            body.update(self.convert_expiry_params(module))
            if not module.check_mode:
                try: