Add logmod SSH wrapper

(cherry picked from commit 18bc40c77a)

changelog/65630.fixed.md

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+Added SSH wrapper for logmod

salt/client/ssh/wrapper/logmod.py

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+"""
+On-demand logging
+=================
+
+.. versionadded:: 2017.7.0
+
+The sole purpose of this module is logging messages in the minion.
+It comes very handy when debugging complex Jinja templates, for example:
+
+.. code-block:: jinja
+
+    {%- for var in range(10) %}
+      {%- do salt["log.info"](var) -%}
+    {%- endfor %}
+
+CLI Example:
+
+.. code-block:: bash
+
+    salt '*' log.error "Please don't do that, this module is not for CLI use!"
+"""
+
+import logging
+
+log = logging.getLogger(__name__)
+
+__virtualname__ = "log"
+
+
+def __virtual__():
+    return __virtualname__
+
+
+def debug(message):
+    """
+    Log message at level DEBUG.
+    """
+    log.debug(message)
+    return True
+
+
+def info(message):
+    """
+    Log message at level INFO.
+    """
+    log.info(message)
+    return True
+
+
+def warning(message):
+    """
+    Log message at level WARNING.
+    """
+    log.warning(message)
+    return True
+
+
+def error(message):
+    """
+    Log message at level ERROR.
+    """
+    log.error(message)
+    return True
+
+
+def critical(message):
+    """
+    Log message at level CRITICAL.
+    """
+    log.critical(message)
+    return True
+
+
+def exception(message):
+    """
+    Log message at level EXCEPTION.
+    """
+    log.exception(message)
+    return True