Drop special remote_tmp casing for targets with become, instead just switch everything to use /tmp for remote tmp.

ansible picks a pretty random dir and this works with the case of users who cannot write to their homedir.

inventory/group_vars/copr-front

@@ -12,7 +12,3 @@ csi_purpose: Provide a publicly accessible frontend for 3rd party packages (copr
 csi_relationship: |
   - This host provides the frontend part of copr only.
   - It's the point of contact between end users and the copr build system (backend, package singer)
-
-# We set this here because we have a task that uses become_user where the user does not
-# have perms to write to their homedir. So we cannot use the default ~user/.ansible tmpdir. 
-ansible_remote_tmp: /tmp/.ansible-${USER}/tmp

inventory/group_vars/copr-front-stg

@@ -7,7 +7,3 @@ csi_purpose: Provide the testing environment of copr's frontend
 csi_relationship: This host is the testing environment for copr's web interface
 
 copr_mbs_cli_login: Y29wcg==##vtvvikhcjncwkfkdcssv
-
-# We set this here because we have a task that uses become_user where the user does not
-# have perms to write to their homedir. So we cannot use the default ~user/.ansible tmpdir. 
-ansible_remote_tmp: /tmp/.ansible-${USER}/tmp

inventory/group_vars/openqa

@@ -72,7 +72,3 @@ fedmsg_certs:
 
 # we need this to log with fedmsg-logger
 fedmsg_active: True
-
-# We set this here because we have a task that uses become_user where the user does not
-# have perms to write to their homedir. So we cannot use the default ~user/.ansible tmpdir. 
-ansible_remote_tmp: /tmp/.ansible-${USER}/tmp

inventory/group_vars/openqa-stg

@@ -87,7 +87,3 @@ fedmsg_active: True
 
 # makes sure it sends stg not prod fedmsgs
 fedmsg_env: stg
-
-# We set this here because we have a task that uses become_user where the user does not
-# have perms to write to their homedir. So we cannot use the default ~user/.ansible tmpdir. 
-#ansible_remote_tmp: /tmp/.ansible-${USER}/tmp

roles/ansible-server/templates/ansible.cfg.j2

@@ -16,7 +16,7 @@ inventory       = {{ ansible_base }}/ansible/inventory
 #library        = /usr/share/my_modules/
 library         = {{ ansible_base }}/ansible/library:/usr/share/ansible
 #module_utils   = /usr/share/my_module_utils/
-#remote_tmp     = ~/.ansible/tmp
+remote_tmp      = /tmp
 #local_tmp      = ~/.ansible/tmp
 #forks          = 5
 forks           = 150