REGTESTS: healthcheckmail: Relax matching on the healthcheck log message

Depending on the timing, the conneciton on lisrv listener may be fully
accepted before any reject. Thus, instead of getting a socket error, an
invalid L7 response is reported. There is no reason to be strick on the
error type. Any failure is good here, because we just want to test the
email-alert feature.

This patch should fix issue #1857. It may be backported as far as 2.2.

(cherry picked from commit 28bc152aa4a42ba91818aaf2af33ccb76f75a426)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 852411765ef0fd15bc8b4b4d1a86a14da5c581ed)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 8bcbeb64bd88111177ba14826ec0aa20265f0427)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/reg-tests/mailers/healthcheckmail.vtc b/reg-tests/mailers/healthcheckmail.vtc
index 43bf588..d36a0d3 100644
--- a/reg-tests/mailers/healthcheckmail.vtc
+++ b/reg-tests/mailers/healthcheckmail.vtc
@@ -5,7 +5,7 @@
 
 syslog S1 -level notice {
     recv
-    expect ~ "[^:\\[ ]\\[${h1_pid}\\]: Health check for server be1/srv1 failed.+reason: Socket error.+info: \".+\".+check duration: [[:digit:]]+ms.+status: 0/1 DOWN."
+    expect ~ "[^:\\[ ]\\[${h1_pid}\\]: Health check for server be1/srv1 failed.+check duration: [[:digit:]]+ms.+status: 0/1 DOWN."
     recv info
     expect ~ "[^:\\[ ]\\[${h1_pid}\\]: Result=SUCCESS Bytes=[[:digit:]]+"
 } -start