Merge pull request #35 from PeterMerkert/master

Solved a lot of tickets
Moved the configuration key for hort, port and name for a satellite
adapter to the ConfigKeys class. The keys were hardcoded in both files
before and needed to be synced.

closes #34

Change-Id: I1e8c75b72319daf899309c58cc4f77ed6d7bca3a
Signed-off-by: Peter Merkert <p.merkert@sap.com>
A check has been introduced to check values of files and directories,
which are mandatory, to be non-null.
This solves the issue, that the JMeter adapter is always showing a green
icon that the connection can always be established.

closes #27

Change-Id: I3fb0c5472925de4261c5da82ec83da939ce563a1
Signed-off-by: Peter Merkert <p.merkert@sap.com>