Create separate file for ConfigMgr class

As the ldap_configuration.cpp was getting long
so it is good to create the seprate file for
ConfigMgr.

TestedBy:
         Ran the unit test.

Signed-off-by: Ratan Gupta <ratagupt@linux.vnet.ibm.com>
Change-Id: I312a9f423d4ab3ca4ebd5f17193f7b02162ded6b
8 files changed