Make CoprClient import optional.

Also, fix one last reference to the old rida module name that I noticed while I was in there.

module_build_service/builder.py

@@ -46,15 +46,18 @@ import kobo.rpmlib
 
 import munch
 from OpenSSL.SSL import SysCallError
-from copr.client import CoprClient
 
 from module_build_service import log, db
 from module_build_service.models import ModuleBuild
 import module_build_service.utils
 
-
 logging.basicConfig(level=logging.DEBUG)
 
+try:
+    from copr.client import CoprClient
+except ImportError:
+    log.exception("Failed to import CoprClient.")
+
 # TODO: read defaults from module_build_service's config
 KOJI_DEFAULT_GROUPS = {
     'build': [

module_build_service/pdc.py

@@ -27,12 +27,19 @@
 
 import modulemd
 from pdc_client import PDCClient
-from copr.client import CoprClient
+
+import logging
+log = logging.getLogger()
+
+try:
+    from copr.client import CoprClient
+except ImportError:
+    log.exception("Failed to import CoprClient.")
+
 import six
 import module_build_service
 
 
-
 def get_pdc_client_session(config):
     """
     :param config: instance of module_build_service.config.Config
@@ -161,7 +168,7 @@ def get_module_repo(session, module_info, strict=False, config=module_build_serv
     :param module_info: list of module_info dicts
     :param strict: Normally this function returns None if no module can be
            found.  If strict=True, then a ValueError is raised.
-    :param config: instance of rida.config.Config
+    :param config: instance of module_build_service.config.Config
     :return: URL to a DNF repository for the module
     """
     module = get_module(session, module_info, strict=strict)