Fixing query delimiters in uri reassembly.

Fixing query delimiters in uri reassembly.

The first delimiter after the uri and before the query is '?'
All eventual delimiters between query params are '&'.
This is missed out on the patch :
https://gerrit.iotivity.org/gerrit/#/c/193.

Change-Id: Iec533d10075e1692a84b36683b0b42b2b702a01e
Signed-off-by: Mandeep Shetty <mandeep.shetty@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/422
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Joseph Morrow <joseph.l.morrow@intel.com>
Reviewed-by: jihwan seo <jihwan.seo@samsung.com>
Reviewed-by: Ashok Babu Channa <ashok.channa@samsung.com>
Reviewed-by: Sashi Penta <sashi.kumar.penta@intel.com>