RDKCOM-3335: RDKBDEV-1281: fix "Device.Ethernet.Interface." pParamName
RDKCOM-3335: RDKBDEV-1281: fix "Device.Ethernet.Interface." pParamName

Reason for change:
fix "Device.Ethernet.Interface." pParamName prefix tests in cosa_apis_busutil.c
Only check for "Device.Ethernet.Interface." at the start of
pParamName and include a final '.' char in the search string.
Test Procedure: Sanity.
Risks: None.
Signed-off-by: Andre McCurdy <armccurdy@gmail.com>

(cherry picked from commit 927280c70f3f9f3d12ba1dd3a729e9fbc34b796e)
Change-Id: I25321c594ea6bcd3eeb1face80c0bea9de97b0f1

rdkcmf/rdkb-CcspPandM,rdkcmf/rdkb-CcspPandM,rdkcmf/rdkb-CcspPandM