[OLINGO-674] updating readme of osgi-server sample using karaf feature
[OLINGO-674] updating readme of osgi-server sample using karaf feature

Signed-off-by: Michael Bolz <bec699c2a9248a41eb4e9c7ced0707cfdd0e088c@sap.com>

apache/olingo-odata4,rareddy/olingo-odata4,AperIati/olingo-odata4,AperIati/olingo-odata4,rareddy/olingo-odata4,flaminc/olingo-odata4,flaminc/olingo-odata4,apache/olingo-odata4