Fixed message for exception thrown during recursive merge

During recursive merge jgit potentially has to merge multiple
common ancestors. If this fails because there are conflicts then
the exception thrown for that should have a message which states
this clearly. Previously a wrong message was given ("More than 200
merge bases ...")

Change-Id: Ia3c058d5575decdefd50390ed83b63668d31c1d1

org.eclipse.jgit/resources/org/eclipse/jgit/internal/JGitText.properties

 mergeStrategyAlreadyExistsAsDefault=Merge strategy "{0}" already exists as a default strategy
 mergeStrategyDoesNotSupportHeads=merge strategy {0} does not support {1} heads to be merged into HEAD
 mergeUsingStrategyResultedInDescription=Merge of revisions {0} with base {1} using strategy {2} resulted in: {3}. {4}
+mergeRecursiveConflictsWhenMergingCommonAncestors=Multiple common ancestors were found and merging them resulted in a conflict: {0}, {1}
 mergeRecursiveReturnedNoCommit=Merge returned no commit:\n Depth {0}\n Head one {1}\n Head two {2}
 mergeRecursiveTooManyMergeBasesFor = "More than {0} merge bases for:\n a {1}\n b {2} found:\n  count {3}"
 messageAndTaggerNotAllowedInUnannotatedTags = Unannotated tags cannot have a message or tagger

org.eclipse.jgit/src/org/eclipse/jgit/internal/JGitText.java

 	/***/ public String mergeStrategyAlreadyExistsAsDefault;
 	/***/ public String mergeStrategyDoesNotSupportHeads;
 	/***/ public String mergeUsingStrategyResultedInDescription;
+	/***/ public String mergeRecursiveConflictsWhenMergingCommonAncestors;
 	/***/ public String mergeRecursiveReturnedNoCommit;
 	/***/ public String mergeRecursiveTooManyMergeBasesFor;
 	/***/ public String messageAndTaggerNotAllowedInUnannotatedTags;

org.eclipse.jgit/src/org/eclipse/jgit/merge/RecursiveMerger.java

 					throw new NoMergeBaseException(
 							NoMergeBaseException.MergeBaseFailureReason.CONFLICTS_DURING_MERGE_BASE_CALCULATION,
 							MessageFormat.format(
-									JGitText.get().mergeRecursiveTooManyMergeBasesFor,
-									Integer.valueOf(MAX_BASES), a.name(),
-									b.name(),
-									Integer.valueOf(baseCommits.size())));
+									JGitText.get().mergeRecursiveConflictsWhenMergingCommonAncestors,
+									currentBase.getName(), nextBase.getName()));
 			}
 		} finally {
 			inCore = oldIncore;