shared: attempt to sort committers by last name (if existing)

shared/contrib-committers.adoc

@@ -1,4 +1,5 @@
 
+* {alven}
 * {ambrisko}
 * {shaun}
 * {jonathan}
@@ -124,6 +125,7 @@
 * {jmg}
 * {mjg}
 * {jhale}
+* {jrhall}
 * {jah}
 * {smh}
 * {ehaupt}
@@ -209,6 +211,7 @@
 * {rmacklem}
 * {vmaffione}
 * {bmah}
+* {siva}
 * {rm}
 * {jmallett}
 * {dwmalone}
@@ -330,6 +333,7 @@
 * {kensmith}
 * {des}
 * {sobomax}
+* {js}
 * {asomers}
 * {tsoome}
 * {loos}
@@ -402,8 +406,4 @@
 * {mizhka}
 * {ziaee}
 * {tz}
-* {alven}
-* {jrhall}
-* {js}
-* {siva}