TT#49106 Do not use absolute paths for commands

This makes it difficult to interpose local scripts to override local
behavior, for testing purposes for example.

Warned-by: lintian
Change-Id: I5e1feda02a26f482728f5404496c5870ec93d8aa

debian/ngcp-rtpengine-daemon.init

@@ -136,7 +136,7 @@ fi
 case "$1" in
   start)
 	set +e
-	if [ -x "/usr/sbin/ngcp-check-active" ]; then
+	if [ -x "$(which ngcp-check-active)" ]; then
 	  case "$(ngcp-check-active -v)" in
 	    active|transition)
 	      log_action_msg "Active node or transition."

debian/ngcp-rtpengine-daemon.postinst

@@ -5,8 +5,8 @@ set -e
 default=/etc/default/ngcp-rtpengine-daemon
 modname=xt_RTPENGINE
 
-if [ -x /usr/sbin/ngcp-virt-identify ]; then
+if [ -x "$(which ngcp-virt-identify)" ]; then
-	if /usr/sbin/ngcp-virt-identify --type container; then
+	if ngcp-virt-identify --type container; then
 		VIRT="yes"
 	fi
 fi

debian/ngcp-rtpengine-iptables-setup

@@ -31,8 +31,8 @@ fi
 
 ###
 
-if [ -x /usr/sbin/ngcp-virt-identify ]; then
+if [ -x "$(which ngcp-virt-identify)" ]; then
-  if /usr/sbin/ngcp-virt-identify --type container; then
+  if ngcp-virt-identify --type container; then
     VIRT="yes"
   fi
 fi

debian/ngcp-rtpengine-kernel-dkms.postinst

@@ -9,8 +9,8 @@ version=$(dpkg-query -W -f="\${Version}" "$package" \
 		|rev|cut -d- -f2-|rev|cut -d':' -f2|tr -d "\n")
 
 
-if [ -x /usr/sbin/ngcp-virt-identify ]; then
+if [ -x "$(which ngcp-virt-identify)" ]; then
-	if /usr/sbin/ngcp-virt-identify --type container; then
+	if ngcp-virt-identify --type container; then
 		VIRT="yes"
 	fi
 fi

debian/ngcp-rtpengine-kernel-dkms.prerm

@@ -8,8 +8,8 @@ name=ngcp-rtpengine
 version=$(dpkg-query -W -f="\${Version}" "$package" \
         |rev|cut -d- -f2-|rev|cut -d':' -f2|tr -d "\n")
 
-if [ -x /usr/sbin/ngcp-virt-identify ]; then
+if [ -x "$(which ngcp-virt-identify)" ]; then
-	if /usr/sbin/ngcp-virt-identify --type container; then
+	if ngcp-virt-identify --type container; then
 		VIRT="yes"
 	fi
 fi

debian/ngcp-rtpengine-recording-daemon.init

@@ -67,7 +67,7 @@ fi
 case "$1" in
   start)
 	set +e
-	if [ -x "/usr/sbin/ngcp-check-active" ]; then
+	if [ -x "$(which ngcp-check-active)" ]; then
 	  case "$(ngcp-check-active -v)" in
 	    active|transition)
 	      log_action_msg "Active node or transition."