Updated archive creation to include manually retrieved packages

resources/custom-properties.yml

diff --git a/resources/custom-properties.yml b/resources/custom-properties.yml
index 1adf552..3596cf6 100644
--- a/resources/custom-properties.yml
+++ b/resources/custom-properties.yml
@@ -165,3 +165,9 @@
 apigee_kernel_sem: '500 32000 32 1024'
 sysctl_pg:
 - { name: 'kernel.sem', value: "{{ apigee_kernel_sem }}" }
+
+# Extra Yum Packages that should be transferred manually for an offline installation
+archive_extra_packages:
+- yum-utils
+- yum-plugin-priorities
+- libdb4-4.8*