initial add of eos shared module

This adds a shared module for communicating with Arista EOS devices over
SSH (cli) or JSON-RPC (eapi).  This modules replaces the eapi.py module
previously added to module_utils.  This commit includes a documentation
fragment that describes the eos common arguments

lib/ansible/utils/module_docs_fragments/eos.py

@@ -0,0 +1,84 @@
+#
+# (c) 2015, Peter Sprygada <psprygada@ansible.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+
+class ModuleDocFragment(object):
+
+    # Standard files documentation fragment
+    DOCUMENTATION = """
+options:
+  host:
+    description:
+      - Specifies the DNS host name or address for connecting to the remote
+        device over the specified transport.  The value of host is used as
+        the destination address for the transport.
+    required: true
+  port:
+    description:
+      - Specifies the port to use when buiding the connection to the remote
+        device.  This value applies to either I(cli) or I(eapi).  The port
+        value will default to the approriate transport common port if
+        none is provided in the task.  (cli=22, http=80, https=443).
+    required: false
+    default: 0 (use common port)
+  username:
+    description:
+      - Configures the usename to use to authenticate the connection to
+        the remote device.  The value of I(username) is used to authenticate
+        either the CLI login or the eAPI authentication depending on which
+        transport is used.
+    required: true
+  password:
+    description:
+      - Specifies the password to use when authentication the connection to
+        the remote device.  This is a common argument used for either I(cli)
+        or I(eapi) transports.
+    required: false
+    default: null
+  authorize:
+    description:
+      - Instructs the module to enter priviledged mode on the remote device
+        before sending any commands.  If not specified, the device will
+        attempt to excecute all commands in non-priviledged mode.
+    required: false
+    default: false
+    choices: BOOLEANS
+  auth_pass:
+    description:
+      - Specifies the password to use if required to enter privileged mode
+        on the remote device.  If I(authorize) is false, then this argument
+        does nothing
+    required: false
+    default: none
+  transport:
+    description:
+      - Configures the transport connection to use when connecting to the
+        remote device.  The transport argument supports connectivity to the
+        device over cli (ssh) or eapi.
+    required: true
+    default: cli
+  use_ssl:
+    description:
+      - Configures the I(transport) to use SSL if set to true only when the
+        I(transport) argument is configured as eapi.  If the transport
+        argument is not eapi, this value is ignored
+    required: false
+    default: true
+    choices: BOOLEANS
+
+"""