messages: Initializing variables various classes

messages: Initializing variables various classes

Fixes the coverity Issues:

** 1019615 Uninitialized scalar field
2. uninit_member: Non-static class member service_type is not initialized
 in this constructor nor in any functions that it calls.
CID 1019615 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
4. uninit_member: Non-static class member service_op is not initialized
 in this constructor nor in any functions that it calls.

** 1019618 Uninitialized scalar field
2. uninit_member: Non-static class member op is not initialized in this
 constructor nor in any functions that it calls.
4. uninit_member: Non-static class member cookie is not initialized in
 this constructor nor in any functions that it calls.
CID 1019618 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
6. uninit_member: Non-static class member last_committed is not initialized
 in this constructor nor in any functions that it calls.

** 1019620 Uninitialized scalar field
2. uninit_member: Non-static class member epoch is not initialized in this
 constructor nor in any functions that it calls.
CID 1019620 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
4. uninit_member: Non-static class member request_ack is not initialized
in this constructor nor in any functions that it calls.

** 1019621 Uninitialized scalar field
2. uninit_member: Non-static class member epoch is not initialized in this
constructor nor in any functions that it calls.
CID 1019621 (#1 of 1): Uninitialized scalar field (UNINIT_CTOR)
4. uninit_member: Non-static class member round is not initialized in this
constructor nor in any functions that it calls

Signed-off-by: Amit Kumar amitkuma@redhat.com