FS-5572 --resolve set new variable by doing export bypass_keep_codec=true to…

FS-5572 --resolve set new variable by doing export bypass_keep_codec=true to force re-invite with the same codec it was using previously

src/mod/endpoints/mod_sofia/mod_sofia.c

@@ -1936,6 +1936,11 @@ static switch_status_t sofia_receive_message(switch_core_session_t *session, swi
 			}
 			sofia_glue_tech_set_local_sdp(tech_pvt, NULL, SWITCH_FALSE);
 
+            if (switch_true(switch_channel_get_variable(session->channel, "bypass_keep_codec"))) {
+                switch_channel_set_variable(session->channel, "absolute_codec_string", switch_channel_get_variable(session->channel, "ep_codec_string"));
+            }
+
+
 			if ((uuid = switch_channel_get_partner_uuid(channel))
 				&& (other_session = switch_core_session_locate(uuid))) {
 				other_channel = switch_core_session_get_channel(other_session);