pgpool2: upgrade 4.7.2 -> 4.7.3

Changelog:
https://www.pgpool.net/docs/latest/en/html/release-4-7-3.html

Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
(cherry picked from commit 192d012d9a)
Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>

meta-networking/recipes-support/pgpool2/pgpool2_4.7.3.bb

@@ -16,7 +16,7 @@ SRC_URI = "https://www.pgpool.net/source/pgpool-II-${PV}.tar.gz \
 	   file://pgpool.sysconfig \
 	   file://pgpool.service \
            "
-SRC_URI[sha256sum] = "e72b9d0ff3620f7da7e33a58dda44b77919d056752dc9bd86b2985c4988d1938"
+SRC_URI[sha256sum] = "4bf9df3e13feb8e64bee486b4ea54c9076296c2d9406165b0b68d32086fce250"
 
 S = "${UNPACKDIR}/pgpool-II-${PV}"