MT#18723 Fix shared IP parsing logic for carrier

Carrier mgmt sp2 installation failed because 'sp'
was improperly parsed in Carrier case.

See /etc/hosts on Carrier:
> x.x.x.x sp1 web01a
> x.x.x.x sp2 web01b
> x.x.x.x sp  web01

and on PRO:
> x.x.x.x sp1
> x.x.x.x sp2
> x.x.x.x sp

As a result variable had multiply values:

> root@web01a:~# IP_HA_SHARED=$(awk '/sp/ { print $1 }' /etc/hosts) ; echo $IP_HA_SHARED
> 172.30.52.168 172.30.52.169 172.30.52.167
> root@web01a:~# IP_HA_SHARED=$(awk '/sp(\s|$)/ { print $1 }' /etc/hosts) ; echo $IP_HA_SHARED
> 172.30.52.167
> root@web01a:~#

Change-Id: If05eac1f0bf415db3bf5013b6452b7f9cb0e4947
(cherry picked from commit acbafb43c3)

deployment.sh

@@ -837,7 +837,7 @@ if "$PRO_EDITION" ; then
     wget --timeout=30 -O "/tmp/hosts" "${MANAGEMENT_IP}:3000/hostconfig/${TARGET_HOSTNAME}"
     IP1=$(awk '/sp1/ { print $1 }' /tmp/hosts) || IP1=$DEFAULT_IP1
     IP2=$(awk '/sp2/ { print $1 }' /tmp/hosts) || IP2=$DEFAULT_IP2
-    IP_HA_SHARED=$(awk '/sp/ { print $1 }' /tmp/hosts) || IP_HA_SHARED=$DEFAULT_IP_HA_SHARED
+    IP_HA_SHARED=$(awk '/sp(\s|$)/ { print $1 }' /tmp/hosts) || IP_HA_SHARED=$DEFAULT_IP_HA_SHARED
 
     if [ -z "$INTERNAL_NETMASK" ]; then
       wget --timeout=30 -O "/tmp/interfaces" "http://${MANAGEMENT_IP}:3000/nwconfig/${TARGET_HOSTNAME}"