I have got a solution...
At first I looked to puppetserver process with strace, and after running puppet agent on managed host I saw this in its output:
[pid 7997] stat("/etc/puppetlabs/code/environments/development/hieradata/hostgroup/PROD/ubuntu/rabbitmq.yaml", {st_mode=S_IFREG|0644, st_size=121, ...}) = 0
[pid 7997] stat("/etc/puppetlabs/code/environments/development/hieradata/hostgroup/PROD/ubuntu/rabbitmq.yaml", {st_mode=S_IFREG|0644, st_size=121, ...}) = 0
[pid 7997] stat("/etc/puppetlabs/code/environments/development/hieradata/hostgroup/PROD/ubuntu/rabbitmq.yaml", {st_mode=S_IFREG|0644, st_size=121, ...}) = 0
[pid 7997] stat("/etc/puppetlabs/code/environments/development/hieradata/hostgroup/PROD/ubuntu/rabbitmq.yaml", {st_mode=S_IFREG|0644, st_size=121, ...}) = 0
[pid 7997] stat("/etc/puppetlabs/code/environments/development/hieradata/hostgroup/PROD/ubuntu/rabbitmq.yaml", {st_mode=S_IFREG|0644, st_size=121, ...}) = 0
[pid 7997] open("/etc/puppetlabs/code/environments/development/hieradata/hostgroup/PROD/ubuntu/rabbitmq.yaml", O_RDONLY) = 37
Then we realized that rabbitmq.yaml is not well written, so after making some changes the host gets its configuration. And that's it.