alembic: Adjust sippeers, queue_members, and voicemail_messages tables.

* Increased the sippeers useragent max string size to 255.

* Changed the queue_members uniqueid to an auto incremented integer
instead of a string.

* Increased the voicemail_messages BLOB size to LONGBLOB on mysql.

* Fixed the add_tables_for_pjsip config change version downgrade actions
to drop a table it created.

* Adjusted the sample alembic.ini files cdr.ini.sample, config.ini.sample,
and voicemail.ini.sample to give a mysql and postgres sqlalchemy.url
lines.

ASTERISK-23847 #close
Reported by: Stephen More

ASTERISK-23825 #close
Reported by: Stephen More

ASTERISK-23909 #close
Reported by: Stephen More

Review: https://reviewboard.asterisk.org/r/3870/
........

Merged revisions 420211 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@420212 65c4cc65-6c06-0410-ace0-fbb531ad65f3

contrib/ast-db-manage/voicemail/versions/39428242f7f5_increase_recording_column_size.py

@@ -0,0 +1,44 @@
+#
+# Asterisk -- An open source telephony toolkit.
+#
+# Copyright (C) 2014, Richard Mudgett
+#
+# Richard Mudgett <rmudgett@digium.com>
+#
+# See http://www.asterisk.org for more information about
+# the Asterisk project. Please do not directly contact
+# any of the maintainers of this project for assistance;
+# the project provides a web site, mailing lists and IRC
+# channels for your use.
+#
+# This program is free software, distributed under the terms of
+# the GNU General Public License Version 2. See the LICENSE file
+# at the top of the source tree.
+#
+
+"""increase recording column size
+
+Revision ID: 39428242f7f5
+Revises: a2e9769475e
+Create Date: 2014-07-28 16:02:05.104895
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '39428242f7f5'
+down_revision = 'a2e9769475e'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    # Make BLOB a LONGBLOB for mysql so recordings longer than about
+    # four seconds can be stored.
+    # See LargeBinary http://docs.sqlalchemy.org/en/rel_0_9/core/types.html
+    op.alter_column('voicemail_messages', 'recording', type_=sa.LargeBinary(4294967295))
+
+
+def downgrade():
+    op.alter_column('voicemail_messages', 'recording', type_=sa.LargeBinary)
+