Sync latest changes for vagrant-onap

Given some internal procedures was not possible to submit all the
changes.  In the meantime, those changes were placed into an
non-official project. This change syncronizes the latest changes
into the official repository.

Issue-id: INT-17

Change-Id: Ia4125f4b70273401e4ed3cc1908d2e2ad7d1c2e9
Signed-off-by: Victor Morales <victor.morales@intel.com>
diff --git a/bootstrap/vagrant-onap/lib/asserts b/bootstrap/vagrant-onap/lib/asserts
index 0e45538..d02cb5d 100755
--- a/bootstrap/vagrant-onap/lib/asserts
+++ b/bootstrap/vagrant-onap/lib/asserts
@@ -2,10 +2,40 @@
 
 set -o xtrace
 
+source /var/onap/commons
+
 # asserts_image() - Function that verifies if a specific image was created
 function asserts_image {
-    if [[ "$(docker images -q $1 2> /dev/null)" == "" ]]; then
-        echo "There is no $1 image"
-        exit 1
+    local image=$1
+    local error_msg=${2:-"There is no $image image"}
+
+    if [[ "$(docker images -q $image 2> /dev/null)" == "" ]]; then
+        raise_error $error_msg
     fi
 }
+
+# asserts_installed_package() - Function that verifies if a specific package was installed.
+function asserts_installed_package {
+    local package=$1
+    local error_msg=${2:-"$package wasn't installed"}
+
+    if ! is_package_installed $package; then
+        raise_error $error_msg
+    fi
+}
+
+# asserts_file_exist() - Function that verifies if a specific file exists
+function asserts_file_exist {
+    local file=$1
+    local error_msg=${2:-"$file doesn't exist"}
+
+    if [ ! -f $file ]; then
+        raise_error $error_msg
+    fi
+}
+
+# raise_error() - Function that prints and exits the execution
+function raise_error {
+    echo $@
+    exit 1
+}