adde dir_mode logic for users.files

pillar.example

       # it's possible to use 'keep' for file_mode, to preserve file original mode, thus you can save
       # execution bit for example.
       file_mode: keep
+      #dir_mode: 775
       sym_mode: 640
       exclude_pat: "*.gitignore"
 

users/user_files.sls

 {%- set user_home = salt['pillar.get'](('users:' ~ username ~ ':home'), current.get('home', '/home/' ~ username )) -%}
 {%- set user_files_template = salt['pillar.get'](('users:' ~ username ~ ':user_files:template'), None) -%}
 {%- set user_files_file_mode = salt['pillar.get'](('users:' ~ username ~ ':user_files:file_mode'), False) -%}
+{%- set user_files_dir_mode = salt['pillar.get'](('users:' ~ username ~ ':user_files:dir_mode'), False) -%}
 {%- set user_files_sym_mode = salt['pillar.get'](('users:' ~ username ~ ':user_files:sym_mode'), False) -%}
 {%- set user_files_exclude_pat = salt['pillar.get'](('users:' ~ username ~ ':user_files:exclude_pat'), False) -%}
 {%- if user_files.enabled -%}
     {% if user_files_file_mode -%}
     - file_mode: {{ user_files_file_mode }}
     {% endif -%}
+    {% if user_files_dir_mode -%}
+    - dir_mode: {{ user_files_dir_mode }}
+    {% endif -%}
     {% if user_files_sym_mode -%}
     - sym_mode: {{ user_files_sym_mode }}
     {% endif -%}