Trigger error if app dependency install fails (Redmine 1006) + allow for 'or' in dependencies (#381)

* Solve issue https://dev.yunohost.org/issues/1006
I purpose this change to improve the helper 'ynh_install_app_dependencies'.
Before this change if the dependences are not installable the install didn't fail. By these change the helper generate an error and the install stop.

* Get the error if apt fail
* Remove old change
* Add dependence choice

data/helpers.d/package

@@ -109,7 +109,7 @@ ynh_package_install_from_equivs () {
      && equivs-build ./control 1>/dev/null \
      && sudo dpkg --force-depends \
           -i "./${pkgname}_${pkgversion}_all.deb" 2>&1 \
-     && ynh_package_install -f)
+     && ynh_package_install -f) || ynh_die "Unable to install dependencies"
     [[ -n "$TMPDIR" ]] && rm -rf $TMPDIR	# Remove the temp dir.
 
     # check if the package is actually installed
@@ -121,8 +121,13 @@ ynh_package_install_from_equivs () {
 #
 # usage: ynh_install_app_dependencies dep [dep [...]]
 # | arg: dep - the package name to install in dependence
+#   You can give a choice between some package with this syntax : "dep1|dep2"
+#   Example : ynh_install_app_dependencies dep1 dep2 "dep3|dep4|dep5"
+#   This mean in the dependence tree : dep1 & dep2 & (dep3 | dep4 | dep5)
 ynh_install_app_dependencies () {
     local dependencies=$@
+    local dependencies=${dependencies// /, }
+    local dependencies=${dependencies//|/ | }
     local manifest_path="../manifest.json"
     if [ ! -e "$manifest_path" ]; then
     	manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
@@ -139,7 +144,7 @@ Section: misc
 Priority: optional
 Package: ${dep_app}-ynh-deps
 Version: ${version}
-Depends: ${dependencies// /, }
+Depends: ${dependencies}
 Architecture: all
 Description: Fake package for ${app} (YunoHost app) dependencies
  This meta-package is only responsible of installing its dependencies.
@@ -158,4 +163,4 @@ EOF
 ynh_remove_app_dependencies () {
     local dep_app=${app//_/-}	# Replace all '_' by '-'
     ynh_package_autopurge ${dep_app}-ynh-deps	# Remove the fake package and its dependencies if they not still used.
-}
+}