nagios_common: Move load into module

Change-Id: I3de4d3daf8a43ff00a5de8edc217154853317d53
nagios_common: Move mail into module

Change-Id: I3275271c26dfb5416065ed45becb643b9e73b0fa
Merge "nagios_common: Move load into module" into production
Merge "nagios_common: Move mail into module" into production