Add site check which retries 3 times up to 15 seconds
Add site check which retries 3 times up to 15 seconds

Signed-off-by: Glenn Oppegard <57bcf4e608e1ae6f1a6f222d33f2d106f4827723@pivotallabs.com>

Amit-PivotalLabs/checkman,cppforlife/checkman,cppforlife/checkman,Pivotal-DataFabric/checkman,Amit-PivotalLabs/checkman,cppforlife/checkman,Amit-PivotalLabs/checkman,cppforlife/checkman,Amit-PivotalLabs/checkman,Pivotal-DataFabric/checkman,Amit-PivotalLabs/checkman,cppforlife/checkman,Pivotal-DataFabric/checkman,Pivotal-DataFabric/checkman,Amit-PivotalLabs/checkman,Pivotal-DataFabric/checkman,cppforlife/checkman,Pivotal-DataFabric/checkman