res_pjsip_session: add new flag use_callerid_contact

Add a new global flag to res_pjsip to allow the callerid to be used
as the username in the contact header.  This allows chan_pjsip to have
the same behavour as chan_sip

ASTERISK-28087 #close

Change-Id: I9a720e058323f6862a91c62f8a8c1a4b5c087b95

contrib/ast-db-manage/config/versions/2bb1a85135ad_pjsip_add_use_callerid_contact.py

@@ -0,0 +1,34 @@
+"""pjsip add use_callerid_contact
+
+Revision ID: 2bb1a85135ad
+Revises: 7f85dd44c775
+Create Date: 2018-10-18 15:13:40.462354
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '2bb1a85135ad'
+down_revision = '465f47f880be'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects.postgresql import ENUM
+
+YESNO_NAME = 'yesno_values'
+YESNO_VALUES = ['yes', 'no']
+
+
+def upgrade():
+    ############################# Enums ##############################
+
+    # yesno_values have already been created, so use postgres enum object
+    # type to get around "already created" issue - works okay with mysql
+    yesno_values = ENUM(*YESNO_VALUES, name=YESNO_NAME, create_type=False)
+
+    op.add_column('ps_globals', sa.Column('use_callerid_contact', yesno_values))
+
+
+def downgrade():
+    if op.get_context().bind.dialect.name == 'mssql':
+        op.drop_constraint('ck_ps_globals_use_callerid_contact_yesno_values','ps_globals')
+    op.drop_column('ps_globals', 'use_callerid_contact')