Try to correct ansible tramp role.

Author: proofit404

roles/tramp/tasks/copy_ssh_key.yml

@@ -1,4 +1,15 @@
-- name: authorize generated ssh key for test user
-  authorized_key: user=test key="{{ lookup('file', '/home/travis/.ssh/id_rsa.pub') }}"
+- name: create ssh directory for test user
+  file: dest=/home/test/.ssh state=directory
+  become: yes
+  become_user: test
+- name: create authorized keys file for test user
+  file: dest=/home/test/.ssh/authorized_keys state=touch
+  become: yes
+  become_user: test
+- name: cat generated ssh key
+  command: cat {{ ansible_env.HOME }}/.ssh/id_rsa.pub
+  register: id_rsa
+- name: register generated key
+  lineinfile: dest=/home/test/.ssh/authorized_keys line="{{ id_rsa.stdout }}"
   become: yes
   become_user: test

roles/tramp/tasks/known_host.yml

@@ -1,2 +1,6 @@
-- name: add test user at localhost to the ssh known hosts
-  known_hosts: name=test@localhost key={{ ansible_env.HOME }}/.ssh/id_rsa.pub
+- name: add known hosts file
+  file: dest={{ ansible_env.HOME }}/.ssh/known_hosts state=touch
+- name: remove all keys belongs to localhost
+  command: ssh-keygen -R localhost
+- name: add localhost to the known hosts
+  shell: ssh-keyscan -H localhost >> {{ ansible_env.HOME }}/.ssh/known_hosts

roles/tramp/tasks/ssh_key.yml

@@ -1,2 +1,2 @@
 - name: generate ssh key for current user
-  user: name=travis generate_ssh_key=yes ssh_key_bits=2048 ssh_key_file=.ssh/id_rsa
+  user: name={{ ansible_env.USER }} generate_ssh_key=yes ssh_key_bits=2048 ssh_key_file=.ssh/id_rsa