Standard / ISO19115-3 / Formatter / Fix namespace declaration

`xmlns:srv` was declared 2 times.

Fixes geonetwork#8221


Related to geonetwork@27a69df#diff-1f83f3131214c0592eea4a9f65ed3a58a889689a64e9f07bc0753544c0427b29

schemas/iso19115-3.2018/src/main/plugin/iso19115-3.2018/formatter/iso19139/view.xsl

@@ -39,7 +39,7 @@
                 xmlns:gcx="http://standards.iso.org/iso/19115/-3/gcx/1.0"
                 xmlns:gex="http://standards.iso.org/iso/19115/-3/gex/1.0"
                 xmlns:lan="http://standards.iso.org/iso/19115/-3/lan/1.0"
-                xmlns:srv="http://standards.iso.org/iso/19115/-3/srv/2.0"
+                xmlns:srv2="http://standards.iso.org/iso/19115/-3/srv/2.0"
                 xmlns:mac="http://standards.iso.org/iso/19115/-3/mac/2.0"
                 xmlns:mas="http://standards.iso.org/iso/19115/-3/mas/1.0"
                 xmlns:mcc="http://standards.iso.org/iso/19115/-3/mcc/1.0"