deployment: do not use logit function in script executed inside chroot

logit() isn't available inside the subshell in the chroot so don't
use it there, we already have it at the according place...

From: Michael Prokop <mprokop@sipwise.com>

deployment.sh

@@ -936,7 +936,6 @@ dpkg -i $INSTALLER
 TRUNK_VERSION=$TRUNK_VERSION SKIP_SOURCES_LIST=$SKIP_SOURCES_LIST ngcp-installer \$ROLE \$IP1 \$IP2 \$EADDR \$EIFACE 2>&1 | tee -a /tmp/ngcp-installer-debug.log
 RC=\${PIPESTATUS[0]}
 if [ \$RC -ne 0 ] ; then
-  logit "installer: error"
   echo "Fatal error while running ngcp-installer:" >&2
   tail -10 /tmp/ngcp-installer.log
   exit \$RC
@@ -950,7 +949,6 @@ dpkg -i $INSTALLER
 TRUNK_VERSION=$TRUNK_VERSION SKIP_SOURCES_LIST=$SKIP_SOURCES_LIST ngcp-installer \$ROLE \$IP1 \$IP2 \$EADDR \$EIFACE \$MCASTADDR 2>&1 | tee -a /tmp/ngcp-installer-debug.log
 RC=\${PIPESTATUS[0]}
 if [ \$RC -ne 0 ] ; then
-  logit "installer: error"
   echo "Fatal error while running ngcp-installer (HA v3):" >&2
   tail -10 /tmp/ngcp-installer.log
   exit \$RC
@@ -964,7 +962,6 @@ dpkg -i $INSTALLER
 echo y | TRUNK_VERSION=$TRUNK_VERSION SKIP_SOURCES_LIST=$SKIP_SOURCES_LIST ngcp-installer 2>&1 | tee -a /tmp/ngcp-installer-debug.log
 RC=\${PIPESTATUS[1]}
 if [ \$RC -ne 0 ] ; then
-  logit "installer: error"
   echo "Fatal error while running ngcp-installer:" >&2
   tail -10 /tmp/ngcp-installer.log
   exit \$RC