plugins: Fix pluggable service getPropertiesFiles() on f5, srx and netscaler

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
netapp: Fix String conversion method of long id

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
plugins: Import and @Parameter fixes

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
Improvements to AWS installation, configuration and use in installation guide