[type/__key_value] Get AWK from POSIX PATH

This is required here, because Solaris /usr/bin/awk does not support the
sub() function.
So xpg4 AWK needs to be used.

cdist/conf/type/__key_value/explorer/state

@@ -40,7 +40,9 @@ else
 fi
 export key state delimiter value exact_delimiter
 
-awk -f - "$file" <<"AWK_EOF"
+awk_bin=$(PATH=$(getconf PATH 2>/dev/null) && command -v awk || echo awk)
+
+"${awk_bin}" -f - "$file" <<"AWK_EOF"
 BEGIN {
     state=ENVIRON["state"]
     key=ENVIRON["key"]

cdist/conf/type/__key_value/files/remote_script.sh

@@ -24,7 +24,10 @@ if [ -f "$file" ]; then
 else
     touch "$file"
 fi
-awk -f - "$file" >"$tmpfile" <<"AWK_EOF"
+
+awk_bin=$(PATH=$(getconf PATH 2>/dev/null) && command -v awk || echo awk)
+
+"${awk_bin}" -f - "$file" >"$tmpfile" <<"AWK_EOF"
 BEGIN {
     # import variables in a secure way ..
     state=ENVIRON["state"]

cdist/conf/type/__key_value/gencode-remote

@@ -25,7 +25,7 @@ state_should="$(cat "$__object/parameter/state")"
 state_is="$(cat "$__object/explorer/state")"
 fire_onchange=''
 
-if [  "$state_is" = "$state_should" ]; then
+if [ "$state_is" = "$state_should" ]; then
     exit 0
 fi