Updated git modules to use readonly url

Also added git-all script

.gitmodules

@@ -1,15 +1,15 @@
 [submodule "installer"]
 	path = installer
-	url = git@github.com:geonetwork/core-installer.git
+	url = git://github.com:geonetwork/core-installer.git
 [submodule "gast"]
 	path = gast
-	url = [email protected]:geonetwork/core-gast.git
+	url = git://github.com:geonetwork/core-gast.git
+[submodule "maven_repo"]
+	path = maven_repo
+	url = git://github.com:geonetwork/core-maven-repo.git
 [submodule "release"]
 	path = release
-	url = git@github.com:geonetwork/core-release.git
+	url = git://github.com:geonetwork/core-release.git
 [submodule "docs"]
 	path = docs
-	url = [email protected]:geonetwork/core-doc-sources.git
-[submodule "maven_repo"]
-	path = maven_repo
-	url = [email protected]:geonetwork/core-maven-repo.git
+	url = git://github.com:geonetwork/core-doc-sources.git

git-all

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+git $@
+
+git submodules foreach "$@"