chore: rename Angular 2 to simply Angular (#2402)

scripts/deploy-install.sh

@@ -5,10 +5,10 @@ set -e -o pipefail
 [[ -z "$NGIO_ENV_DEFS" ]] && . ./scripts/env-set.sh
 
 if [[ -e "$NG2_REPO" ]]; then
-    echo Angular2 repo is already present at: $NG2_REPO
+    echo Angular repo is already present at: $NG2_REPO
 else
     travis_fold start install.ng2
-    echo GETTING Angular2 from GitHub ...
+    echo GETTING Angular from GitHub ...
     set -x
     git clone https://github.com/angular/angular.git $NG2_REPO
     git -C $NG2_REPO checkout $LATEST_RELEASE